.arrow-up {
	width: 0; 
	height: 0; 
	border-left: 7px solid transparent;
	border-right: 7px solid transparent;	
	border-bottom: 7px solid black;
}

.arrow-down {
	width: 0; 
	height: 0; 
	border-left: 7px solid transparent;
	border-right: 7px solid transparent;
	
	border-top: 7px solid black;
}

.arrow-right {
	width: 0; 
	height: 0; 
	border-top: 60px solid transparent;
	border-bottom: 60px solid transparent;
	
	border-left: 60px solid green;
}

.arrow-left {
	width: 0; 
	height: 0; 
	border-top: 10px solid transparent;
	border-bottom: 10px solid transparent; 
	
	border-right:10px solid blue; 
}