diff --git a/src/coolant/condenser.cpp b/src/coolant/condenser.cpp
index 06b08f0..cb6c1dd 100644
--- a/src/coolant/condenser.cpp
+++ b/src/coolant/condenser.cpp
@@ -19,6 +19,14 @@ condenser::condenser(fluid_t type, double height, double diameter, double mass,
 	this->level = level;
 }
 
+condenser::condenser(const Json::Value& node) :
+		height(node["height"].asDouble()),
+		diameter(node["diameter"].asDouble()),
+		fluid_holder(node)
+{
+
+}
+
 void condenser::update(double secs)
 {
 	update_base(secs);
diff --git a/src/coolant/condenser.hpp b/src/coolant/condenser.hpp
index 6ab2372..9f34855 100644
--- a/src/coolant/condenser.hpp
+++ b/src/coolant/condenser.hpp
@@ -14,10 +14,11 @@ class condenser : public fluid_holder
 public:
 
 	condenser(fluid_t type, double height, double diameter, double mass, double level);
+	condenser(const Json::Value& node);
 	
 	void update(double dt);
 
-	virtual operator Json::Value() const;
+	operator Json::Value() const;
 };
 
 };
diff --git a/src/coolant/evaporator.cpp b/src/coolant/evaporator.cpp
index c81aa43..1db4307 100644
--- a/src/coolant/evaporator.cpp
+++ b/src/coolant/evaporator.cpp
@@ -22,6 +22,14 @@ evaporator::evaporator(fluid_t type, double height, double diameter, double mass
 	this->level = level;
 }
 
+evaporator::evaporator(const Json::Value& node) :
+		height(node["height"].asDouble()),
+		diameter(node["diameter"].asDouble()),
+		fluid_holder(node)
+{
+	steam_output = node["steam_output"].asDouble();
+}
+
 double evaporator::get_steam_output()
 {
 	return steam_output;
diff --git a/src/coolant/evaporator.hpp b/src/coolant/evaporator.hpp
index fbe52aa..5e09b07 100644
--- a/src/coolant/evaporator.hpp
+++ b/src/coolant/evaporator.hpp
@@ -16,8 +16,9 @@ class evaporator : public fluid_holder
 public:
 
 	evaporator(fluid_t type, double height, double diameter, double mass, double level);
+	evaporator(const Json::Value& node);
 	
-	virtual operator Json::Value() const;
+	operator Json::Value() const;
 
 	double get_steam_output();
 	void update(double dt);
diff --git a/src/coolant/fluid_holder.cpp b/src/coolant/fluid_holder.cpp
index 5be021c..b33f609 100644
--- a/src/coolant/fluid_holder.cpp
+++ b/src/coolant/fluid_holder.cpp
@@ -14,6 +14,14 @@ fluid_holder::fluid_holder(fluid_t fluid, double volume, double extra_mass) : fl
 
 }
 
+fluid_holder::fluid_holder(const Json::Value& node) : fluid(node["fluid"]), volume(node["volume"].asDouble()), extra_mass(node["extra_mass"].asDouble())
+{
+	level = node["level"].asDouble();
+	steam = node["steam"].asDouble();
+	air = node["air"].asDouble();
+	heat = node["heat"].asDouble();
+}
+
 double fluid_holder::add_heat(double m1, double t1)
 {
 	double t2 = get_heat();
diff --git a/src/coolant/fluid_holder.hpp b/src/coolant/fluid_holder.hpp
index 94d04bd..5f1cd4d 100644
--- a/src/coolant/fluid_holder.hpp
+++ b/src/coolant/fluid_holder.hpp
@@ -21,6 +21,7 @@ class fluid_holder
 public:
 	
 	fluid_holder(fluid_t fluid, double volume, double extra_mass);
+	fluid_holder(const Json::Value& node);
 	
 	const fluid_t fluid;
 	const double volume; // litres
@@ -45,7 +46,7 @@ public:
 	virtual double get_pressure() const; // pascals
 	virtual double get_gas_density() const; // g/L
 	
-	virtual operator Json::Value() const;
+	operator Json::Value() const;
 	
 	static double calc_pressure(double heat, double pressure, double mol);
 	static double calc_pressure_mol(double heat, double pressure, double volume);
diff --git a/src/coolant/fluid_t.hpp b/src/coolant/fluid_t.hpp
index d1c5f4a..6bffc30 100644
--- a/src/coolant/fluid_t.hpp
+++ b/src/coolant/fluid_t.hpp
@@ -23,6 +23,15 @@ struct fluid_t
 
 	}
 
+	fluid_t(const Json::Value& node) :
+			gPl(node["gPl"].asDouble()),
+			gPmol(node["gPmol"].asDouble()),
+			jPg(node["jPg"].asDouble()),
+			vapor_pressure(node["vapor_pressure"])
+	{
+
+	}
+
 	operator Json::Value() const
 	{
 		Json::Value node;
diff --git a/src/coolant/pump.cpp b/src/coolant/pump.cpp
index 7a67b21..a04a3ec 100644
--- a/src/coolant/pump.cpp
+++ b/src/coolant/pump.cpp
@@ -3,6 +3,7 @@
 
 #include <cmath>
 #include <iostream>
+#include <string>
 
 using namespace sim::coolant;
 
@@ -104,6 +105,34 @@ void pump::update(double dt)
 	flow = dst_volume / dt;
 }
 
+static pump::mode_t get_mode(std::string mode)
+{
+	if(mode == "SRC")
+		return pump::mode_t::SRC;
+	if(mode == "DST")
+		return pump::mode_t::DST;
+
+	return pump::mode_t::NONE;
+}
+
+pump::pump(const Json::Value& node, fluid_holder* src, fluid_holder* dst) :
+		mode(get_mode(node["mode"].asString())),
+		mass(node["mass"].asDouble()),
+		radius(node["radius"].asDouble()),
+		l_per_rev(node["l_per_rev"].asDouble()),
+		friction(node["friction"].asDouble()),
+		max_power(node["max_power"].asDouble()),
+		target(node["target"].asDouble()),
+		pid(node["pid"]),
+		src(src),
+		dst(dst)
+{
+	flow = node["flow"].asDouble();
+	velocity = node["velocity"].asDouble();
+	power = node["power"].asDouble();
+	powered = node["powered"].asBool();
+}
+
 pump::operator Json::Value() const
 {
 	Json::Value node;
diff --git a/src/coolant/pump.hpp b/src/coolant/pump.hpp
index e117fdc..032aef3 100644
--- a/src/coolant/pump.hpp
+++ b/src/coolant/pump.hpp
@@ -39,6 +39,7 @@ public:
 	bool powered = false;
 
 	pump(fluid_holder* src, fluid_holder* dst, double mass, double radius, double power, double l_per_rev, double friction, mode_t mode, double target);
+	pump(const Json::Value& node, fluid_holder* src, fluid_holder* dst);
 
 	double get_flow() const; // L/s
 	double get_flow_target() const; // L/s
diff --git a/src/coolant/valve.cpp b/src/coolant/valve.cpp
index 40cf58b..3ad2fdf 100644
--- a/src/coolant/valve.cpp
+++ b/src/coolant/valve.cpp
@@ -81,6 +81,13 @@ void valve::update(double dt)
 	this->flow = (mass_s + mass_a) / dt;
 }
 
+valve::valve(const Json::Value& node, fluid_holder* src, fluid_holder* dst) : src(src), dst(dst), max(node["max"].asDouble())
+{
+	speed = node["speed"].asDouble();
+	state = node["state"].asDouble();
+	flow = node["flow"].asDouble();
+}
+
 valve::operator Json::Value() const
 {
 	Json::Value node;
diff --git a/src/coolant/valve.hpp b/src/coolant/valve.hpp
index fe9c0a7..ab78698 100644
--- a/src/coolant/valve.hpp
+++ b/src/coolant/valve.hpp
@@ -20,6 +20,7 @@ class valve
 public:
 
 	valve(fluid_holder* src, fluid_holder* dst, double state, double max);
+	valve(const Json::Value& node, fluid_holder* src, fluid_holder* dst);
 
 	void update(double secs);
 	void add_open_speed(double v);
diff --git a/src/coolant/vapor_pressure.cpp b/src/coolant/vapor_pressure.cpp
index 67862f2..3ddb4b6 100644
--- a/src/coolant/vapor_pressure.cpp
+++ b/src/coolant/vapor_pressure.cpp
@@ -15,6 +15,14 @@ double vapor_pressure::calc_t(double p) const
 	return B / (A - std::log(p) / std::log(10)) - C;
 }
 
+vapor_pressure::vapor_pressure(const Json::Value& node) :
+		A(node["A"].asDouble()),
+		B(node["B"].asDouble()),
+		C(node["C"].asDouble())
+{
+
+}
+
 vapor_pressure::operator Json::Value() const
 {
 	Json::Value node;
diff --git a/src/coolant/vapor_pressure.hpp b/src/coolant/vapor_pressure.hpp
index 0131f8f..2b7dc78 100644
--- a/src/coolant/vapor_pressure.hpp
+++ b/src/coolant/vapor_pressure.hpp
@@ -12,6 +12,7 @@ struct vapor_pressure
 	
 	constexpr vapor_pressure(double A, double B, double C) : A(A), B(B), C(C) { }
 
+	vapor_pressure(const Json::Value& node);
 	operator Json::Value() const;
 
 	double calc_p(double t) const;
diff --git a/src/electric/turbine.cpp b/src/electric/turbine.cpp
index 7a15543..45f2afc 100644
--- a/src/electric/turbine.cpp
+++ b/src/electric/turbine.cpp
@@ -21,6 +21,15 @@ turbine::turbine(coolant::fluid_t type, coolant::condenser* condenser, double le
 	
 }
 
+turbine::turbine(const Json::Value& node, coolant::condenser* condenser) :
+		condenser(condenser),
+		length(node["length"].asDouble()),
+		diameter(node["diameter"].asDouble()),
+		sim::coolant::fluid_holder(node)
+{
+	velocity = node["velocity"].asDouble();
+}
+
 void turbine::update(double dt)
 {
 	
diff --git a/src/electric/turbine.hpp b/src/electric/turbine.hpp
index 0edc48d..975e091 100644
--- a/src/electric/turbine.hpp
+++ b/src/electric/turbine.hpp
@@ -19,6 +19,7 @@ class turbine : public sim::coolant::fluid_holder
 public:
 
 	turbine(coolant::fluid_t type, coolant::condenser* condenser, double length, double diameter, double mass);
+	turbine(const Json::Value& node, coolant::condenser* condenser);
 	
 	void update(double dt);
 	
@@ -40,7 +41,7 @@ public:
 	virtual double get_pressure() const { return condenser->get_pressure(); } // pascals
 	virtual double get_gas_density() const { return condenser->get_gas_density(); } // g/L
 	
-	virtual operator Json::Value() const;
+	operator Json::Value() const;
 };
 
 };
diff --git a/src/graphics/input/keyboard.cpp b/src/graphics/input/keyboard.cpp
index 00cf233..56512fd 100644
--- a/src/graphics/input/keyboard.cpp
+++ b/src/graphics/input/keyboard.cpp
@@ -47,7 +47,10 @@ static void cb_keypress(GLFWwindow* win, int key, int sc, int action, int mods)
 			sim::system::active.speed = 43200; // 12 h/s
 			break;
 		case GLFW_KEY_O:
-			sim::system::active.save();
+			sim::system::save();
+			break;
+		case GLFW_KEY_L:
+			sim::system::load();
 			break;
 		}
 	}
diff --git a/src/graphics/widget/clock.cpp b/src/graphics/widget/clock.cpp
index 4ba09ae..9e84866 100644
--- a/src/graphics/widget/clock.cpp
+++ b/src/graphics/widget/clock.cpp
@@ -21,6 +21,7 @@ using namespace sim::graphics::widget;
 void clock::update(double dt)
 {
 	mesh m;
+	double at = 3600 * 12 + system::active.clock;
 	glm::vec2 wsize(resize::get_size() / 2);
 	std::stringstream ss;
 
@@ -32,7 +33,6 @@ void clock::update(double dt)
    	ss << std::setfill('0') << std::setw(2) << t_m << ":";
 	ss << std::setfill('0') << std::setw(2) << t_s << "\n";
 	ss << "Day: " << std::floor(at / (3600 * 24)) << "\n";
-	at += dt * sim::system::active.speed;
 
 	m.load_text(ss.str().c_str(), 20);
 	
diff --git a/src/graphics/widget/clock.hpp b/src/graphics/widget/clock.hpp
index 5228949..52a502a 100644
--- a/src/graphics/widget/clock.hpp
+++ b/src/graphics/widget/clock.hpp
@@ -8,7 +8,6 @@ namespace sim::graphics::widget
 
 struct clock
 {
-	double at = 3600 * 12;
 	glmesh data;
 	
 	void update(double dt);
diff --git a/src/main.cpp b/src/main.cpp
index 5ca443c..26feabd 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -37,14 +37,11 @@ int main()
 //	tests::run();
 //	return 0;
 
-	std::ofstream log("log.csv");
 	graphics::window::create();
 
 	long clock = get_now();
 	double at = 0;
 
-	log << R"("clock","level","steam","heat","pressure")" << "\n";
-
 	while(!graphics::window::should_close())
 	{
 		long now = get_now();
@@ -59,12 +56,6 @@ int main()
 		graphics::window::update(dt);
 		graphics::focus::update(dt);
 		graphics::window::render();
-
-		log << at << ",";
-		log << sim::system::active.condenser->get_level() << ",";
-		log << sim::system::active.condenser->get_steam() << ",";
-		log << sim::system::active.condenser->get_heat() << ",";
-		log << sim::system::active.condenser->get_pressure() << "\n";
 	}
 
 	graphics::window::destroy();
diff --git a/src/reactor/builder.cpp b/src/reactor/builder.cpp
index 3f30e58..82fa227 100644
--- a/src/reactor/builder.cpp
+++ b/src/reactor/builder.cpp
@@ -1,5 +1,9 @@
 
 #include "builder.hpp"
+#include "control/boron_rod.hpp"
+#include "control/graphite_rod.hpp"
+#include "coolant/pipe.hpp"
+#include "coolant/heater.hpp"
 
 #include <cmath>
 #include <vector>
@@ -45,3 +49,24 @@ sim::reactor::reactor sim::reactor::builder(const int W, const int H, const doub
 	return reactor(&arr[0], W, H, CW, CH);
 }
 
+std::unique_ptr<rod> sim::reactor::load_rod(const Json::Value& node, coolant::vessel* v)
+{
+	int id = node["id"].asInt();
+
+	switch(id)
+	{
+	case 1:
+		return std::make_unique<fuel::fuel_rod>(node);
+	case 2:
+		return std::make_unique<coolant::pipe>(node, v);
+	case 3:
+		return std::make_unique<coolant::heater>(node);
+	case 4:
+		return std::make_unique<control::graphite_rod>(node);
+	case 5:
+		return std::make_unique<control::boron_rod>(node, v);
+	}
+
+	return std::make_unique<rod>();
+}
+
diff --git a/src/reactor/builder.hpp b/src/reactor/builder.hpp
index 1064be0..807eb08 100644
--- a/src/reactor/builder.hpp
+++ b/src/reactor/builder.hpp
@@ -3,17 +3,16 @@
 
 #include "rod.hpp"
 #include "fuel/fuel_rod.hpp"
-#include "control/boron_rod.hpp"
-#include "control/graphite_rod.hpp"
-#include "coolant/pipe.hpp"
-#include "coolant/heater.hpp"
 #include "coolant/vessel.hpp"
 #include "reactor.hpp"
 
+#include <json/json.h>
+
 namespace sim::reactor
 {
 
 reactor builder(const int W, const int H, const double CW, const double CH, fuel::fuel_rod fr, coolant::vessel* v, const char** lines);
+std::unique_ptr<rod> load_rod(const Json::Value& node, coolant::vessel* v);
 
 };
 
diff --git a/src/reactor/control/boron_rod.cpp b/src/reactor/control/boron_rod.cpp
index 1830fc8..46a94e5 100644
--- a/src/reactor/control/boron_rod.cpp
+++ b/src/reactor/control/boron_rod.cpp
@@ -9,6 +9,20 @@ constexpr double boron_density = 2340000; // g/m^3
 constexpr double boron_molar_mass = 10; // g/mol
 constexpr double boron_molar_density = boron_density / boron_molar_mass; // mol/m^3
 
+boron_rod::boron_rod(const Json::Value& node, coolant::vessel* v) : coolant::pipe(node, v)
+{
+	inserted = node["inserted"].asDouble();
+	absorbed = node["absorbed"].asDouble();
+}
+
+Json::Value boron_rod::serialize() const
+{
+	Json::Value node(coolant::pipe::serialize());
+	node["inserted"] = inserted;
+	node["absorbed"] = absorbed;
+	return node;
+}
+
 boron_rod::boron_rod(coolant::vessel* v) : coolant::pipe(v)
 {
 
diff --git a/src/reactor/control/boron_rod.hpp b/src/reactor/control/boron_rod.hpp
index 7652cf0..dead840 100644
--- a/src/reactor/control/boron_rod.hpp
+++ b/src/reactor/control/boron_rod.hpp
@@ -19,7 +19,9 @@ class boron_rod : public coolant::pipe
 public:
 	
 	boron_rod(coolant::vessel* v);
+	boron_rod(const Json::Value& node, coolant::vessel* v);
 
+	virtual Json::Value serialize() const;
 	virtual void update(double secs);
 	void set_reactivity(double a);
 	double get_inserted() { return inserted; }
diff --git a/src/reactor/control/graphite_rod.cpp b/src/reactor/control/graphite_rod.cpp
index 7c87b9d..32a2237 100644
--- a/src/reactor/control/graphite_rod.cpp
+++ b/src/reactor/control/graphite_rod.cpp
@@ -5,6 +5,18 @@
 
 using namespace sim::reactor::control;
 
+graphite_rod::graphite_rod(const Json::Value& node) : rod(node)
+{
+	inserted = node["inserted"].asDouble();
+}
+
+Json::Value graphite_rod::serialize() const
+{
+	Json::Value node(rod::serialize());
+	node["inserted"] = inserted;
+	return node;
+}
+
 void graphite_rod::display(std::ostream& o) const
 {
 	o << "Inserted: " << (inserted * 100) << "%\n";
diff --git a/src/reactor/control/graphite_rod.hpp b/src/reactor/control/graphite_rod.hpp
index f5b8316..ce9e1be 100644
--- a/src/reactor/control/graphite_rod.hpp
+++ b/src/reactor/control/graphite_rod.hpp
@@ -19,7 +19,12 @@ class graphite_rod : public sim::reactor::rod
 	double get_inserted() { return inserted; }
 
 public:
+	
+	constexpr graphite_rod() {}
 
+	graphite_rod(const Json::Value& node);
+
+	virtual Json::Value serialize() const;
 	virtual void update(double secs);
 	void set_reactivity(double a);
 	
diff --git a/src/reactor/coolant/heater.cpp b/src/reactor/coolant/heater.cpp
index 1d3eecb..cc6b2e7 100644
--- a/src/reactor/coolant/heater.cpp
+++ b/src/reactor/coolant/heater.cpp
@@ -3,6 +3,18 @@
 
 using namespace sim::reactor::coolant;
 
+heater::heater(const Json::Value& node) : rod(node)
+{
+	rate = node["rate"].asDouble();
+}
+
+Json::Value heater::serialize() const
+{
+	Json::Value node(rod::serialize());
+	node["rate"] = rate;
+	return node;
+}
+
 void heater::update(double secs)
 {
 	update_rod(secs);
diff --git a/src/reactor/coolant/heater.hpp b/src/reactor/coolant/heater.hpp
index 75958f0..626ee05 100644
--- a/src/reactor/coolant/heater.hpp
+++ b/src/reactor/coolant/heater.hpp
@@ -18,7 +18,12 @@ class heater : public sim::reactor::rod
 	virtual int get_id() const { return 3; }
 
 public:
+	
+	constexpr heater() {}
+	
+	heater(const Json::Value& node);
 
+	virtual Json::Value serialize() const;
 	virtual void update(double secs);
 	virtual bool should_display() const { return true; }
 	virtual bool should_select() const { return true; }
diff --git a/src/reactor/coolant/pipe.cpp b/src/reactor/coolant/pipe.cpp
index bc06964..15e458d 100644
--- a/src/reactor/coolant/pipe.cpp
+++ b/src/reactor/coolant/pipe.cpp
@@ -10,6 +10,18 @@ pipe::pipe(coolant::vessel* v)
 	this->steam = 0;
 }
 
+pipe::pipe(const Json::Value& node, coolant::vessel* v) : vessel(v)
+{
+	steam = node["steam"].asDouble();
+}
+
+Json::Value pipe::serialize() const
+{
+	Json::Value node(rod::serialize());
+	node["steam"] = steam;
+	return node;
+}
+
 double pipe::get_k(val_t type) const
 {
 	return vessel->get_level() / vessel->get_volume() * 0.5;
diff --git a/src/reactor/coolant/pipe.hpp b/src/reactor/coolant/pipe.hpp
index 001e9c1..30a3236 100644
--- a/src/reactor/coolant/pipe.hpp
+++ b/src/reactor/coolant/pipe.hpp
@@ -23,7 +23,9 @@ protected:
 public:
 
 	pipe(coolant::vessel* v);
+	pipe(const Json::Value& node, coolant::vessel* v);
 
+	virtual Json::Value serialize() const;
 	virtual std::unique_ptr<rod> clone() const { return std::make_unique<pipe>(*this); }
 	virtual bool should_display() const { return true; }
 	virtual void update(double secs);
diff --git a/src/reactor/coolant/vessel.cpp b/src/reactor/coolant/vessel.cpp
index 7059d84..6d0e5cf 100644
--- a/src/reactor/coolant/vessel.cpp
+++ b/src/reactor/coolant/vessel.cpp
@@ -23,6 +23,15 @@ vessel::vessel(sim::coolant::fluid_t fluid, double height, double diameter, doub
 	this->level = level;
 }
 
+vessel::vessel(const Json::Value& node) :
+		sim::coolant::fluid_holder(node),
+		height(node["height"].asDouble()),
+		diameter(node["diameter"].asDouble()),
+		bubble_hl(node["bubble_hl"].asDouble())
+{
+	steam_suspended = node["steam_suspended"].asDouble();
+}
+
 double vessel::get_steam_suspended() const
 {
 	return steam_suspended;
diff --git a/src/reactor/coolant/vessel.hpp b/src/reactor/coolant/vessel.hpp
index 4c851a4..af1970a 100644
--- a/src/reactor/coolant/vessel.hpp
+++ b/src/reactor/coolant/vessel.hpp
@@ -19,13 +19,14 @@ public:
 	double steam_suspended = 0; // grams
 
 	vessel(sim::coolant::fluid_t fluid, double height, double diameter, double mass, double level, double bubble_hl);
+	vessel(const Json::Value& node);
 
 	double get_steam_suspended() const; // grams
 	double get_void_ratio() const;
 
 	void update(double secs);
 	
-	virtual operator Json::Value() const;
+	operator Json::Value() const;
 
 	friend std::ostream& operator<<(std::ostream& o, const vessel& v)
 	{
diff --git a/src/reactor/fuel/fuel_rod.cpp b/src/reactor/fuel/fuel_rod.cpp
index fe2c250..a029aa0 100644
--- a/src/reactor/fuel/fuel_rod.cpp
+++ b/src/reactor/fuel/fuel_rod.cpp
@@ -15,6 +15,18 @@ fuel_rod::fuel_rod(double fuel) : s(fuel)
 
 }
 
+fuel_rod::fuel_rod(const Json::Value& node) : s(node["sample"]), rod(node)
+{
+	
+}
+
+Json::Value fuel_rod::serialize() const
+{
+	Json::Value node(rod::serialize());
+	node["sample"] = s;
+	return node;
+}
+
 void fuel_rod::display(std::ostream& o) const
 {
 	double mol = fuel_molar_density * get_volume();
diff --git a/src/reactor/fuel/fuel_rod.hpp b/src/reactor/fuel/fuel_rod.hpp
index ff4be62..291eb81 100644
--- a/src/reactor/fuel/fuel_rod.hpp
+++ b/src/reactor/fuel/fuel_rod.hpp
@@ -23,7 +23,9 @@ class fuel_rod : public sim::reactor::rod
 public:
 
 	fuel_rod(double fuel);
+	fuel_rod(const Json::Value& node);
 	
+	virtual Json::Value serialize() const;
 	virtual std::unique_ptr<rod> clone() const { return std::make_unique<fuel_rod>(*this); }
 	virtual bool should_display() const { return true; }
 	virtual void update(double secs);
diff --git a/src/reactor/fuel/sample.cpp b/src/reactor/fuel/sample.cpp
index 8638ba2..a52d1ea 100644
--- a/src/reactor/fuel/sample.cpp
+++ b/src/reactor/fuel/sample.cpp
@@ -15,6 +15,41 @@ sample::sample(double fuel)
 	this->mass = 1;
 }
 
+sample::sample(const Json::Value& node) : waste(node["waste"])
+{
+	fuel = node["fuel"].asDouble();
+	i_135 = node["i_135"].asDouble();
+	xe_135 = node["xe_135"].asDouble();
+	te_135 = node["te_135"].asDouble();
+	u_238 = node["u_238"].asDouble();
+	mass = node["mass"].asDouble();
+
+	energy = node["energy"].asDouble();
+	fast_neutrons = node["neutrons"]["fast"].asDouble();
+	slow_neutrons = node["neutrons"]["slow"].asDouble();
+	efficiency = node["efficiency"].asDouble();
+}
+
+sample::operator Json::Value() const
+{
+	Json::Value node;
+
+	node["waste"] = waste;
+	node["fuel"] = fuel;
+	node["i_135"] = i_135;
+	node["xe_135"] = xe_135;
+	node["te_135"] = te_135;
+	node["u_238"] = u_238;
+	node["mass"] = mass;
+
+	node["energy"] = energy;
+	node["neutrons"]["fast"] = fast_neutrons;
+	node["neutrons"]["slow"] = slow_neutrons;
+	node["efficiency"] = efficiency;
+
+	return node;
+}
+
 void sample::update(double secs)
 {
 	double m;
diff --git a/src/reactor/fuel/sample.hpp b/src/reactor/fuel/sample.hpp
index 777479c..c6a415c 100644
--- a/src/reactor/fuel/sample.hpp
+++ b/src/reactor/fuel/sample.hpp
@@ -33,7 +33,10 @@ class sample
 public:
 
 	sample(double fuel);
+	sample(const Json::Value& node);
 
+	operator Json::Value() const;
+	
 	void update(double secs);
 
 	constexpr double get_fuel() const { return fuel; }
diff --git a/src/reactor/fuel/waste.cpp b/src/reactor/fuel/waste.cpp
index 291d516..63b6d22 100644
--- a/src/reactor/fuel/waste.cpp
+++ b/src/reactor/fuel/waste.cpp
@@ -4,6 +4,40 @@
 
 using namespace sim::reactor::fuel;
 
+waste::waste(const Json::Value& node)
+{
+	const Json::Value& j_ladder = node["ladder"];
+	
+	for(int i = 0; i < N; i++)
+	{
+		high[i] = j_ladder[i][0].asDouble();
+		low[i] = j_ladder[i][1].asDouble();
+	}
+
+	neutrons = node["neutrons"].asDouble();
+	energy = node["energy"].asDouble();
+}
+
+waste::operator Json::Value() const
+{
+	Json::Value node;
+	Json::Value j_ladder;
+	
+	for(int i = 0; i < N; i++)
+	{
+		Json::Value j_step;
+		j_step.append(high[i]);
+		j_step.append(low[i]);
+		j_ladder.append(std::move(j_step));
+	}
+
+	node["ladder"] = std::move(j_ladder);
+	node["neutrons"] = neutrons;
+	node["energy"] = energy;
+
+	return node;
+}
+
 void waste::update(double secs)
 {
 	double next[waste::N - 1] = {0};
diff --git a/src/reactor/fuel/waste.hpp b/src/reactor/fuel/waste.hpp
index 68c3590..2e0b661 100644
--- a/src/reactor/fuel/waste.hpp
+++ b/src/reactor/fuel/waste.hpp
@@ -1,6 +1,8 @@
 
 #pragma once
 
+#include <json/json.h>
+
 namespace sim::reactor::fuel
 {
 
@@ -14,6 +16,12 @@ class waste
 	double energy = 0;
 
 public:
+	
+	constexpr waste() { };
+
+	waste(const Json::Value& node);
+
+	operator Json::Value() const;
 
 	void update(double secs);
 	void add_fissile(double amount);
diff --git a/src/reactor/reactor.cpp b/src/reactor/reactor.cpp
index 5fbbb5b..db80679 100644
--- a/src/reactor/reactor.cpp
+++ b/src/reactor/reactor.cpp
@@ -1,6 +1,7 @@
 
 #include "reactor.hpp"
 #include "../util/random.hpp"
+#include "builder.hpp"
 
 #include <algorithm>
 
@@ -239,6 +240,24 @@ void reactor::get_stats(rod::val_t type, double& min, double& max)
 	}
 }
 
+reactor::reactor(const Json::Value& node, coolant::vessel* v) :
+		cell_width(node["cell_width"].asDouble()),
+		cell_height(node["cell_height"].asDouble()),
+		width(node["width"].asDouble()),
+		height(node["height"].asDouble()),
+		size(node["size"].asDouble())
+{
+	const Json::Value& j_rods = node["rods"];
+	
+	rod_speed = node["rod_speed"].asDouble();
+	cursor = node["cursor"].asInt();
+
+	for(int i = 0; i < size; i++)
+	{
+		rods.push_back(load_rod(j_rods[i], v));
+	}
+}
+
 reactor::operator Json::Value() const
 {
 	Json::Value node;
@@ -260,13 +279,16 @@ reactor::operator Json::Value() const
 
 		if(rods[i]->get_id() == 0)
 		{
-			continue;
+			Json::Value j_rod;
+			j_rod["id"] = 0;
+			j_rods.append(std::move(j_rod));
 		}
 
-		Json::Value j_rod(*rods[i]);
-		j_rod["pos"]["x"] = x;
-		j_rod["pos"]["y"] = y;
-		j_rods.append(std::move(j_rod));
+		else
+		{
+			Json::Value j_rod(rods[i]->serialize());
+			j_rods.append(std::move(j_rod));
+		}
 	}
 
 	node["rods"] = std::move(j_rods);
diff --git a/src/reactor/reactor.hpp b/src/reactor/reactor.hpp
index 6d14d2e..c824b40 100644
--- a/src/reactor/reactor.hpp
+++ b/src/reactor/reactor.hpp
@@ -2,6 +2,7 @@
 #pragma once
 
 #include "rod.hpp"
+#include "coolant/vessel.hpp"
 
 #include <iostream>
 #include <memory>
@@ -24,6 +25,7 @@ struct reactor
 	int cursor;
 
 	reactor(std::unique_ptr<rod>* rods, int width, int height, double cell_width, double cell_height);
+	reactor(const Json::Value& node, coolant::vessel* v);
 	reactor(const reactor& r);
 	reactor(reactor&& r);
 	
diff --git a/src/reactor/rod.cpp b/src/reactor/rod.cpp
index a7e2b0e..03e1923 100644
--- a/src/reactor/rod.cpp
+++ b/src/reactor/rod.cpp
@@ -82,7 +82,20 @@ void rod::update_rod(double secs)
 	}
 }
 
-rod::operator Json::Value() const
+rod::rod(const Json::Value& node)
+{
+	const Json::Value& j_vals = node["vals"];
+	
+	selected = node["selected"].asBool();
+
+	for(int i = 0; i < VAL_N; i++)
+	{
+		vals[i] = j_vals[i][0].asDouble();
+		vals_n[i] = j_vals[i][1].asDouble();
+	}
+}
+
+Json::Value rod::serialize() const
 {
 	Json::Value node;
 	Json::Value j_vals;
diff --git a/src/reactor/rod.hpp b/src/reactor/rod.hpp
index 3da06cb..608420f 100644
--- a/src/reactor/rod.hpp
+++ b/src/reactor/rod.hpp
@@ -25,6 +25,9 @@ public:
 		N_FAST = 2,
 	};
 
+	constexpr rod() {};
+	rod(const Json::Value& node);
+
 	virtual ~rod() {};
 	virtual void interact(rod* o, double secs);
 	virtual void update(double secs) { }
@@ -62,7 +65,7 @@ public:
 		return o;
 	}
 
-	operator Json::Value() const;
+	virtual Json::Value serialize() const;
 
 protected:
 
diff --git a/src/system.cpp b/src/system.cpp
index 9aba2e2..02712c4 100644
--- a/src/system.cpp
+++ b/src/system.cpp
@@ -55,28 +55,31 @@ system::system()
 	freight_pump = std::make_unique<coolant::pump>(sink.get(), evaporator.get(), 1e5, 1, 1e4, 0.1, 10, coolant::pump::mode_t::DST, 1e6);
 }
 
-system::system(system&& o)
+system::system(const Json::Value& node)
 {
-	vessel = std::move(o.vessel);
-	reactor = std::move(o.reactor);
-	condenser = std::move(o.condenser);
-	turbine = std::move(o.turbine);
+	clock = node["clock"].asDouble();
 
-	sink = std::move(o.sink);
-	condenser_secondary = std::move(o.condenser_secondary);
-	evaporator = std::move(o.evaporator);
+	vessel = std::make_unique<reactor::coolant::vessel>(node["vessel"]);
+	reactor = std::make_unique<reactor::reactor>(node["reactor"], vessel.get());
+	condenser = std::make_unique<coolant::condenser>(node["condenser"]);
+	turbine = std::make_unique<electric::turbine>(node["turbine"], condenser.get());
 
-	turbine_bypass_valve = std::move(o.turbine_bypass_valve);
-	turbine_inlet_valve = std::move(o.turbine_inlet_valve);
+	evaporator = std::make_unique<coolant::evaporator>(node["evaporator"]);
+	sink = std::make_unique<coolant::sink>(evaporator->fluid, 11, 0, 0);
+	condenser_secondary = std::make_unique<coolant::condenser_secondary>(condenser.get(), evaporator.get(), 1000);
 
-	primary_pump = std::move(o.primary_pump);
-	secondary_pump = std::move(o.secondary_pump);
-	freight_pump = std::move(o.freight_pump);
+	turbine_inlet_valve = std::make_unique<coolant::valve>(node["valve"]["turbine"]["inlet"], vessel.get(), turbine.get());
+	turbine_bypass_valve = std::make_unique<coolant::valve>(node["valve"]["turbine"]["bypass"], vessel.get(), condenser.get());
+
+	primary_pump = std::make_unique<coolant::pump>(node["pump"]["primary"], condenser.get(), vessel.get());
+	secondary_pump = std::make_unique<coolant::pump>(node["pump"]["secondary"], evaporator.get(), condenser_secondary.get());
+	freight_pump = std::make_unique<coolant::pump>(node["pump"]["freight"], sink.get(), evaporator.get());
 }
 
 void system::update(double dt)
 {
 	dt *= speed;
+	clock += dt;
 	
 	turbine_inlet_valve->update(dt);
 	turbine_bypass_valve->update(dt);
@@ -100,20 +103,21 @@ system::operator Json::Value() const
 	node["turbine"] = *turbine;
 	node["condenser"] = *condenser;
 	node["evaporator"] = *evaporator;
-	node["primary_pump"] = *primary_pump;
-	node["secondary_pump"] = *secondary_pump;
-	node["freight_pump"] = *freight_pump;
-	node["turbine_inlet_valve"] = *turbine_inlet_valve;
-	node["turbine_bypass_valve"] = *turbine_bypass_valve;
-	node["camera"] = graphics::camera::serialize();
+	node["pump"]["primary"] = *primary_pump;
+	node["pump"]["secondary"] = *secondary_pump;
+	node["pump"]["freight"] = *freight_pump;
+	node["valve"]["turbine"]["inlet"] = *turbine_inlet_valve;
+	node["valve"]["turbine"]["bypass"] = *turbine_bypass_valve;
 	node["reactor"] = *reactor;
+	node["clock"] = clock;
 
 	return node;
 }
 
 void system::save()
 {
-	Json::Value root(*this);
+	Json::Value root(active);
+	root["camera"] = graphics::camera::serialize();
 
 	Json::StreamWriterBuilder builder;
 	builder["commentStyle"] = "None";
@@ -125,3 +129,15 @@ void system::save()
 	savefile.close();
 }
 
+void system::load()
+{
+	Json::Value root;
+	std::ifstream savefile("savefile.json");
+	savefile >> root;
+	savefile.close();
+
+	system sys(root);
+	graphics::camera::load(root["camera"]);
+	active = std::move(sys);
+}
+
diff --git a/src/system.hpp b/src/system.hpp
index 94be2e1..06421d3 100644
--- a/src/system.hpp
+++ b/src/system.hpp
@@ -40,13 +40,15 @@ struct system
 
 	sim::graphics::mesh scene;
 	double speed = 1;
+	double clock = 0;
 
 	system();
-	system(system&& o);
-	system(const system& o) = delete;
+	system(const Json::Value& node);
 
 	void update(double dt);
-	void save();
+
+	static void save();
+	static void load();
 
 	operator Json::Value() const;
 };
diff --git a/src/util/pid.cpp b/src/util/pid.cpp
index 5cb6a4d..1f8adf6 100644
--- a/src/util/pid.cpp
+++ b/src/util/pid.cpp
@@ -27,6 +27,17 @@
 using namespace std;
 using namespace sim::util;
 
+PID::PID(const Json::Value& node) :
+    _max(node["max"].asDouble()),
+    _min(node["min"].asDouble()),
+    _Kp(node["Kp"].asDouble()),
+    _Kd(node["Kd"].asDouble()),
+    _Ki(node["Ki"].asDouble()),
+    _pre_error(node["pre_error"].asDouble()),
+    _integral(node["integral"].asDouble())
+{
+	
+}
 
 PID::operator Json::Value() const
 {
diff --git a/src/util/pid.hpp b/src/util/pid.hpp
index d7a405e..20ae70b 100644
--- a/src/util/pid.hpp
+++ b/src/util/pid.hpp
@@ -44,6 +44,7 @@ class PID
 		// pv - current process value
         double calculate( double dt, double sp, double pv );
 	
+		PID(const Json::Value& node);
 		operator Json::Value() const;
 
     private: