@Override
	public void start() {
		bg1 = new Background(0, 0);
		bg2 = new Background(Background.WIDTH, 0);
		robot = new Robot();
		try {
			loadMap("map1");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}		
		hb = new Heliboy(340, 360);
		hb2 = new Heliboy(700, 360);
		Thread thread = new Thread(this);
		thread.start();		
	}