var HouseBuilder = Container.expand(function () {
	var self = Container.call(this);
	self.build = function (villager) {
		var newHouse = new House();
		newHouse.initializeRandomPosition();
		villager.parent.addChild(newHouse);
		villager.state = 'atHome';
		villager.home = newHouse;
		newHouse.scheduleVillagerWork(villager);
	};
});
var ResourceCollector = Container.expand(function () {
	var self = Container.call(this);
	self.collect = function (villager) {
		if (villager.workplace) {
			if (villager.workplace instanceof Tree) {
				villager.gameResources.food.amount += 1;
				villager.carriedFood += 1;
			} else if (villager.workplace.resourceType) {
				var resource = villager.workplace.resourceType;
				resource.amount += 1;
			}
			villager.moveTo(villager.home.x, villager.home.y, 'goingHome');
			villager.game.updateResourceDisplay();
		}
	};
});
var Resource = Container.expand(function (type, amount) {
	var self = Container.call(this);
	self.type = type;
	self.amount = amount;
	var resourceGraphics = self.createAsset(type.toLowerCase() + 'Image', type + ' Image', .5, .5);
});
var Tree = Container.expand(function () {
	var self = Container.call(this);
	var treeGraphics = self.createAsset('treeImage', 'Tree Image', .5, .5);
});
var Villager = Container.expand(function (resources) {
	var self = Container.call(this);
	Villager.prototype.continuousMove = function () {
		if (this.x < this.speed || this.x > 2048 - this.speed) this.directionX *= -1;
		if (this.y < this.speed || this.y > 2732 - this.speed) this.directionY *= -1;
		this.x = Math.max(this.speed, Math.min(2048 - this.speed, this.x + this.speed * this.directionX));
		this.y = Math.max(this.speed, Math.min(2732 - this.speed, this.y + this.speed * this.directionY));
		if (Math.random() < 0.05) {
			this.directionX = Math.random() < 0.5 ? -1 : 1;
			this.directionY = Math.random() < 0.5 ? -1 : 1;
		}
	};
	Villager.prototype.directionX = 1;
	Villager.prototype.directionY = 1;
	Villager.prototype.restAtHome = function () {
		this.state = 'resting';
		this.tiredness = Math.max(0, this.tiredness - 0.1);
		if (this.home) {
			this.home.occupy(this);
		}
		if (this.tiredness <= 0) {
			this.state = 'atHome';
		}
	};
	Villager.prototype.isDoingSomething = function () {
		return this.state === 'goingToWork' || this.state === 'working' || this.state === 'goingHome' || this.state === 'resting' || this.state === 'plantingTree' || this.state === 'buildingHouse';
	};
	Villager.prototype.carriedWood = 0;
	Villager.prototype.carriedRock = 0;
	Villager.prototype.carriedFood = 0;
	Villager.prototype.tiredness = 0;
	Villager.prototype.canBuildHouse = function () {
		return this.gameResources && this.gameResources.wood.amount >= 200 && this.gameResources.rock.amount >= 200 && this.gameResources.food.amount >= 200;
	};
	Villager.prototype.calculateBuildUtility = function () {
		return this.canBuildHouse() ? 0.8 : 0;
	};
	Villager.prototype.hasResources = function () {
		return this.carriedWood > 0 || this.carriedRock > 0 || this.carriedFood > 0;
	};
	Villager.prototype.canFallInLove = function (otherVillager) {
		return this.state === 'atHome' && otherVillager.state === 'atHome' && !this.partner && !otherVillager.partner;
	};
	self.gameResources = resources;
	Villager.prototype.buildHouse = function (houseBuilder) {
		if (this.canBuildHouse(this.gameResources)) {
			houseBuilder.build(this);
			this.gameResources.wood.amount -= 200;
			this.gameResources.rock.amount -= 200;
			this.gameResources.food.amount -= 200;
		}
	};
	self.collectResource = function () {
		self.resourceCollector.collect(self);
	};
	self.arriveHome = function () {
		self.restAtHome();
	};
	self.startWorking = function () {
		self.state = 'working';
		self.workplace.employ(self);
	};
	var villagerGraphics = self.createAsset('villager', 'Villager Graphics', .5, .5);
	self.targetX = null;
	self.targetY = null;
	self.home = null;
	self.workplace = null;
	self.resourceType = null;
	self.speed = 12;
	self.moveTo = function (x, y, state) {
		self.targetX = x;
		self.targetY = y;
		if (state) self.state = state;
	};
	self.update = function () {
		self.continuousMove();
		if (!self.isDoingSomething()) {
			self.decideNextAction();
		}
		self.executeCurrentAction();
	};
	self.decideNextAction = function () {
		var utilities = [{
			action: 'work',
			utility: self.calculateWorkUtility()
		}, {
			action: 'home',
			utility: self.calculateHomeUtility()
		}, {
			action: 'plant',
			utility: self.calculatePlantUtility(self.gameResources)
		}, {
			action: 'buildHouse',
			utility: self.calculateBuildUtility()
		}];
		utilities.sort(function (a, b) {
			return b.utility - a.utility;
		});
		var chosenAction = utilities[0].action;
		self.state = chosenAction;
		if (chosenAction === 'work' && self.workplace && self.workplace.x !== null && self.workplace.y !== null) {
			self.moveTo(self.workplace.x, self.workplace.y, 'goingToWork');
		}
	};
	self.executeCurrentAction = function () {
		switch (self.state) {
			case 'goingToWork':
				if (self.workplace && self.workplace.x !== null && self.workplace.y !== null) {
					self.moveTowards(self.workplace.x, self.workplace.y);
					if (self.intersects(self.workplace)) {
						self.state = 'working';
						self.startWorking();
					}
				}
				break;
			case 'working':
				self.collectResource();
				break;
			case 'goingHome':
				if (self.home) {
					self.moveTowards(self.home.x, self.home.y);
					if (self.intersects(self.home)) {
						self.arriveHome();
					}
				}
				break;
			case 'resting':
				self.restAtHome();
				break;
			case 'plantingTree':
				self.plantTree();
				break;
			case 'buildingHouse':
				self.buildHouse();
				break;
		}
	};
	self.plantTree = function () {
		if (!self.workplace) {
			var tree = new Tree();
			tree.x = Math.random() * 2048;
			tree.y = Math.random() * 2732;
			self.parent.addChild(tree);
			self.workplace = tree;
			self.gameResources.food.amount -= 100;
		}
	};
	self.calculateWorkUtility = function () {
		return self.workplace && self.workplace.resourceType && self.workplace.resourceType.amount > 0 ? 0.8 : 0.2;
	};
	self.calculateHomeUtility = function () {
		return self.tiredness > 0.7 || self.hasResources() ? 0.8 : 0.2;
	};
	self.calculatePlantUtility = function (gameResources) {
		return self.gameResources && self.gameResources.food.amount > 100 && !self.workplace ? 0.7 : 0;
	};
	self.moveTowards = function (x, y) {
		if (self.x !== x || self.y !== y) {
			self.moveTo(x, y);
			self.moveTowardsTarget();
		}
	};
	self.moveTowardsTarget = function () {
		if (self.targetX !== null && self.targetY !== null) {
			var dx = self.targetX - self.x;
			var dy = self.targetY - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < self.speed) {
				self.x = self.targetX;
				self.y = self.targetY;
				self.targetX = null;
				self.targetY = null;
			} else {
				var angle = Math.atan2(dy, dx);
				self.x += Math.cos(angle) * Math.min(self.speed, distance);
				self.y += Math.sin(angle) * Math.min(self.speed, distance);
			}
		}
	};
});
var OccupiableHouse = Container.expand(function () {
	var self = Container.call(this);
	var houseGraphics = self.createAsset('house', 'House Graphics', .5, .5);
	self.isOccupiable = true;
	self.occupy = function (villager) {};
});
var EmployingWorkPlace = Container.expand(function () {
	var self = Container.call(this);
	var workplaceGraphics = self.createAsset('workplace', 'Workplace Graphics', .5, .5);
	self.isEmploying = true;
	self.employ = function (villager) {};
});
var House = Container.expand(function () {
	var self = Container.call(this);
	House.prototype.scheduleVillagerWork = function (villager) {
		LK.setTimeout(function () {
			villager.state = 'goingToWork';
			villager.moveTo(villager.workplace.x, villager.workplace.y);
		}, 5000);
	};
	House.prototype.initializeRandomPosition = function () {
		this.x = Math.random() * 2048;
		this.y = Math.random() * 2732;
	};
	var houseGraphics = self.createAsset('house', 'House Graphics', .5, .5);
	self.isOccupiable = true;
	House.prototype.occupy = function (villager) {
		if (!this.isOccupiable) return;
		this.isOccupiable = false;
		villager.home = this;
		this.scheduleVillagerWork(villager);
	};
});
var ResourceDisplay = Container.expand(function (resources) {
	var self = Container.call(this);
	var resourceDisplayText = new Text2('', {
		size: 50,
		fill: "#ffffff"
	});
	resourceDisplayText.anchor.set(0.5, 0);
	resourceDisplayText.x = 2048 / 2 - 800 - 500 + 100;
	resourceDisplayText.y = 50;
	LK.gui.topCenter.addChild(resourceDisplayText);
	self.update = function () {
		resourceDisplayText.setText('Resources: Wood ' + resources.wood.amount + ' Rock ' + resources.rock.amount + ' Food ' + resources.food.amount);
	};
});
var VillagerAndFramerateDisplay = Container.expand(function (game) {
	var self = Container.call(this);
	self.villagers = game.villagers;
	var villagerCountText = new Text2('', {
		size: 50,
		fill: "#ffffff"
	});
	villagerCountText.anchor.set(0.5, 0);
	villagerCountText.x = 2048 / 2 - 200;
	villagerCountText.y = 50;
	LK.gui.topCenter.addChild(villagerCountText);
	var framerateText = new Text2('', {
		size: 100,
		fill: "#ffffff"
	});
	framerateText.anchor.set(0, 1);
	framerateText.x = 500;
	framerateText.y = 2732;
	LK.gui.topCenter.addChild(framerateText);
	var lastTick = LK.ticks;
	var frameCount = 0;
	var lastSecond = Math.floor(lastTick / 60);
	self.update = function () {
		var currentTick = LK.ticks;
		var currentSecond = Math.floor(currentTick / 60);
		frameCount++;
		if (currentSecond > lastSecond) {
			framerateText.setText('FPS: ' + frameCount);
			framerateText.visible = true;
			frameCount = 0;
			lastSecond = currentSecond;
		}
		villagerCountText.setText('Villagers: ' + (self.villagers ? self.villagers.length : 0));
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	self.villagers = [];
	self.villagerAndFramerateDisplay = new VillagerAndFramerateDisplay(self);
	self.updateResourceDisplay = function () {
		var resourceDisplay = new ResourceDisplay(resources);
		resourceDisplay.update();
	};
	self.handleVillagersFallingInLove = function () {
		for (var i = 0; i < self.villagers.length; i++) {
			for (var j = i + 1; j < self.villagers.length; j++) {
				var villagerA = self.villagers[i];
				var villagerB = self.villagers[j];
				if (villagerA.canFallInLove(villagerB)) {
					var newVillager = self.createAndAddVillager(villagerA.home.x, villagerA.home.y);
					newVillager.home = villagerA.home;
					newVillager.workplace = houses[Math.floor(Math.random() * houses.length)];
					villagers.push(newVillager);
					villagerA.partner = villagerB;
					villagerB.partner = villagerA;
					break;
				}
			}
		}
	};
	function createResources() {
		return {
			wood: new Resource('Wood', 100),
			rock: new Resource('Rock', 100),
			food: new Resource('Food', 100)
		};
	}
	var resources = createResources();
	self.addChild(resources.wood);
	self.addChild(resources.rock);
	self.addChild(resources.food);
	var background = self.createAsset('background', 'Background Graphics', 0, 0);
	background.width = 4096 * 0.8;
	background.height = 5464 * 0.8;
	background.x = (2048 - background.width) / 2;
	background.y = (2732 - background.height) / 2 - 400;
	self.addChildAt(background, 0);
	var resourceCollector = new ResourceCollector();
	Game.prototype.createAndAddVillager = function (x, y) {
		var villager = new Villager(this.resources);
		villager.x = x;
		villager.y = y;
		this.addChild(villager);
		this.villagers.push(villager);
		return villager;
	};
	self.villagers = [];
	self.houses = [];
	self.villagers.push(self.createAndAddVillager(1024, 1366));
	self.villagers.push(self.createAndAddVillager(1024, 1500));
	Game.prototype.createAndAddHouse = function (x, y) {
		var house = new House();
		house.x = x;
		house.y = y;
		this.addChild(house);
		this.houses.push(house);
		return house;
	};
	var houses = [];
	houses.push(self.createAndAddHouse(2048 / 2, 2732 / 2));
	Game.prototype.createAndAddWorkplace = function () {
		var workplace = new EmployingWorkPlace();
		workplace.x = Math.random() * 2048;
		workplace.y = Math.random() * 2732;
		this.addChild(workplace);
		this.workplaces.push(workplace);
		return workplace;
	};
	self.workplaces = [];
	self.workplaces.push(self.createAndAddWorkplace());
	var house = new OccupiableHouse();
	house.x = 2048 / 2;
	house.y = 2732 / 2;
	houses.push(house);
	self.addChild(house);
	var workplace = new EmployingWorkPlace();
	workplace.x = Math.random() * 2048;
	workplace.y = Math.random() * 2732;
	self.workplaces.push(workplace);
	self.addChild(workplace);
	self.villagerCreationInterval = LK.setInterval(function () {
		self.createAndAddVillager(Math.random() * 2048, Math.random() * 2732);
	}, 300);
	LK.on('tick', function () {
		self.villagerAndFramerateDisplay.update();
		self.updateResourceDisplay();
		for (var i = 0; i < self.villagers.length; i++) {
			self.villagers[i].update();
		}
		self.handleVillagersFallingInLove();
	});
});

===================================================================
--- original.js
+++ change.js
@@ -134,9 +134,9 @@
 			return b.utility - a.utility;
 		});
 		var chosenAction = utilities[0].action;
 		self.state = chosenAction;
-		if (chosenAction === 'work' && self.workplace) {
+		if (chosenAction === 'work' && self.workplace && self.workplace.x !== null && self.workplace.y !== null) {
 			self.moveTo(self.workplace.x, self.workplace.y, 'goingToWork');
 		}
 	};
 	self.executeCurrentAction = function () {