CSS Diamond Recursive

HTML

<div id="diamond"><div id="after"></div></div>

CSS

#diamond {
	width: 0;
	height: 0;
	border: 50px solid transparent;
	border-bottom-color: red;
	position: relative;
	top: -50px;
}
#after {
	position: absolute;
	left: -50px;
	top: 50px;
	width: 0;
	height: 0;
	border: 50px solid transparent;
	border-top-color: red;
}