#rojo{
	position:absolute;
	top:100px;
	left:100px;
	width:200px;
	height:200px;
	background:red;
	border:3px solid black;
	z-index:1;
}

#amarillo{
	position:absolute;
	top:200px;
	left:200px;
	width:200px;
	height:200px;
	background:yellow;
	border:3px dotted black;
	z-index:0;
}

#azul{
	position:absolute;
	top:275px;
	left:275px;
	width:200px;
	height:200px;
	background:blue;
	border:3px dotted black;
	z-index:2;
}