negative border radius

1.player {
2    width: 480px;
3    height: 80px;
4    border-radius:0 40px 40px 0;
5    background-color:#0000FF;
6    position:relative;    
7    color:#FFF;
8}
9
10.player:before
11{
12    width: 80px;
13    height: 80px;
14    border-radius:0 40px 40px 0;
15    background-color:#FFF;    
16    display:inline-block;
17    vertical-align: middle;
18    margin-right: 10px;
19    content: '';
20}