* {
	margin:0;
	padding:0;
}
body {
	background:black;
	overflow:hidden;
}
.container {
	width:20px;
	height:60px;
	position:absolute;
}
.nav {
	height:20px;
	width:20px;
	display:block;
	margin-top:12px;
	border-radius:10px;
	background:#33ccff;
	opacity:0.8;
}
.nav:before {
	content:'';
	height:0px;
	width:0px;
	opacity:0.8;
	display:block;
	position:absolute;
	top:0;
	border-right:10px solid transparent;
	border-bottom:20px solid #33ccff;
	border-left:10px solid transparent;
}