#star-six {
	width: 0;
	height: 0;
	border-left: 50px solid transparent;
	border-right: 50px solid transparent;
	border-bottom: 100px solid red;
	position: relative;
}
#star-six:after {
	width: 0;
	height: 0;
	border-left: 50px solid transparent;
	border-right: 50px solid transparent;
	border-top: 100px solid red;
	position: absolute;
	content: "";
	top: 30px;
	left: -50px;
}