.arrow:before{position:absolute;left:50%}.arrow{-webkit-transform:rotate(45deg);animation-duration:2s;animation-iteration-count:infinite;animation-name:arrow}.arrow:before{content:'';width:20px;height:20px;top:50%;margin:-10px 0 0 -10px;border-left:0;border-top:0;border-right:1px #fff solid;border-bottom:1px #fff solid;animation-duration:.5s;animation-iteration-count:infinite;animation-name:arrow}