===================================================================
--- original.js
+++ change.js
@@ -19,8 +19,10 @@
 	self.move = function () {};
 });
 var Game = Container.expand(function () {
 	var self = Container.call(this);
+	var background = self.createAsset('background', 'Background image', 0, 0);
+	background.scale.set(2);
 	var mario = self.addChild(new Mario());
 	var mushrooms = [];
 	var enemies = [];
 	mario.x = 1024;