mismith

/**
 * How to make 3-corner-rounded triangle in CSS (SO)
 * http://stackoverflow.com/q/14446677/1397351
 */
.triangle, .triangle:before, .triangle:after {
	width: 20em; height: 20em;
	border-radius: 20%;
}
.triangle {
	overflow: hidden;

mismith

/**
 * The first commented line is your dabblet’s title
 */
.triangle, .triangle:before, .triangle:after {
	width: 4em; height: 4em;
	border-radius: 20%;
}
.triangle {
	overflow: hidden;
	position: relative;