* {
	margin:0;
	padding:0;
}
#show {
	margin:10px auto;
	width:100px;
	height:30px;
	line-height:30px;
	border:2px solid red;
	border-radius:50%;
	text-align:center;
}
.dv {
	border:1px solid #000;
	margin:100px auto;
	position:relative;
	perspective:1500px;
	transform-style:preserve-3d;
	transform:rotateX(-15deg) rotateY(15deg);
}
#dv {
	width:20px;
	height:20px;
}
.id {
	background-color:blue;
	opacity:.5;
	position:absolute;
	left:0px;
	top:0px;
}
#l,#r {
	transform:rotateY(90deg);
	background-color:yellow;
}
#b {
	background-color:red;
}
.ball {
	width:20px;
	height:20px;
	background-color:red;
	border-radius:50%;
	position:absolute;
}