eyeofmidas.com/htdocs/js/boxgame.js

function BoxGame() {
	var container = null;
	var canvas = null;
	var contextType = '2d';
	var contextAttributes = {};
	var context = null;

	var game = null;
	var boxes = [];
	this.create = function(elementName) {
		game = this;
		container = document.getElementById(elementName);
		canvas = container.getElementsByTagName('canvas')[0];
		window.addEventListener('resize', game.handleResize);
		canvas.addEventListener('mousemove', game.handleMouseMove);
		window.requestAnimationFrame(game.handleRequestAnimationFrame);
		this.handleResize(null);
	};


	this.handleResize = function(event) {
		canvas.width = container.offsetWidth;
		canvas.height = container.offsetHeight;
		context = canvas.getContext(contextType, contextAttributes);
		context.translate(0.5, 0.5);
		game.init(canvas);
	}

	this.handleRequestAnimationFrame = function(event) {
		game.update(canvas);
		context.fillStyle = "#FFFFFF";
		context.fillRect(0 ,0, canvas.width, canvas.height);
		game.draw(context);
		window.requestAnimationFrame(game.handleRequestAnimationFrame);
	}


	this.handleMouseMove = function(event) {
		game.mouseMove(canvas, event.offsetX, event.offsetY);
	}

	this.init = function(canvas) {
		boxes = [];

		var boxDensity = Math.floor((canvas.width * canvas.height) / 2000);
		for(var i = 0; i < boxDensity; i++) {
			boxes.push(new Box());
		}

		/*for(var i = 0; i < 100; i++) {
			boxes.push(new Circle());
		}*/

		

		/*for(var i = 0; i < boxDensity; i++) {
			boxes.push(new BinaryFloater());
		}*/

		/*for(var i = 0; i < 25; i++) {
			boxes.push(new Triangle());
		}*/

		/*for(var i = 0; i < 25; i++) {
			boxes.push(new StarShape());
		}*/

		for(var i = 0, box = boxes[0]; box = boxes[i]; i++) {
			box.init(canvas);
		}
	};
	this.update = function(canvas) {
		for(var i = 0, box = boxes[0]; box = boxes[i]; i++) {
			box.update(canvas);
		}
	};
	this.draw = function(context) {

		for(var i = 0, box = boxes[0]; box = boxes[i]; i++) {
			box.draw(context);
		}
	};

	this.mouseMove = function(canvas, x, y) {
	};
}