var director = cocos.Director.sharedDirector();
var scene = new cocos.Scene();
scene.init();

// our test sprite
var sprite = new cocos.Sprite();
sprite.initWithFile("Icon.png");
var pt = new cocos.Point();
pt.x = 240;
pt.y = 160;
sprite.position = pt;

// will call "update" every frame if there's an update property
sprite.scheduleUpdate();
sprite.speed = new cocos.Point();
sprite.speed.x = Math.random() * 10 - 5;
sprite.speed.y = Math.random() * 10 - 5;

// the actual update function
sprite.update = function () {
	var curPos = this.position;
	curPos.x += this.speed.x;
	curPos.y += this.speed.y;
	this.position = curPos;
	if (curPos.x >= 480 || curPos.x <= 0) this.speed.x *= -1;
	if (curPos.y >= 320 || curPos.y <= 0) this.speed.y *= -1;
};

// adds the sprite to the scene
scene.addChild(sprite);

// let the games begin
director.runWithScene(scene);