.center li{position:relative;display:block;float:left;background:rgba(60,60,60,1);width:50px;height:50px;border-radius:100%;overflow:hidden}.center li:before{position:absolute;content:"";width:50px;width:inherit;height:50px;height:inherit;top:22px;left:22px;border:5px solid white;border-radius:40%;box-sizing:border-box}