#box1 {
	position: absolute;
	top: 50px;
	left: 50px;
	width: 50px;
	height: 50px;
	background: #ccc;
}

#box2 {
	position: absolute;
	top: 50px;
	left: 150px;
	width: 50px;
	height: 50px;
	background: #999;
}

#box3 {
	position: absolute;
	top: 150px;
	left: 50px;
	width: 50px;
	height: 50px;
	background: #666;
}

#box4 {
	position: absolute;
	top: 150px;
	left: 150px;
	width: 50px;
	height: 50px;
	background: #333;
}