I didn't undestand this css in this http://jsfiddle.net/b45aX/
border-top: 13px solid transparent;
border-right: 26px solid purple;
border-bottom: 13px solid transparent;
How they can make this shape like arrow ?
I didn't undestand this css in this http://jsfiddle.net/b45aX/
border-top: 13px solid transparent;
border-right: 26px solid purple;
border-bottom: 13px solid transparent;
How they can make this shape like arrow ?