#background {
	width: 100%;
	height: 100%;
	background: black;
	position: absolute;
	top: 0;
	right: 0;
	z-index: 0;	
}

#ground {
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0;
	right: 0;
	z-index: 30;	
}

#game {
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0;
	right: 0;
	z-index: 60;	
}

#hud {
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0;
	right: 0;
	z-index: 90;	
}

#ship {
	width: 100px;
	height: 100px;
	position: absolute;
	top: 50%;
	left: 50%;
	background: white;
}