.cloud{width:200px;height:60px;background:#4bc5ff;border-radius:200px;-moz-border-radius:200px;-webkit-border-radius:200px;position:relative;margin-top:-50px}.cloud:after,.cloud:before{content:"";background:#4bc5ff;width:100px;height:80px;position:absolute;top:-15px;left:10px;border-radius:100px;-moz-border-radius:100px;-webkit-border-radius:100px;transform:rotate(30deg);-moz-transform:rotate(30deg)}.cloud:after{width:120px;height:120px;top:-55px;left:auto;right:15px}.x1{margin-left:2200px;animation:moveclouds 50s linear infinite}.x2{left:-800px;opacity:.6}.x2,.x3{margin-left:2200px;animation:moveclouds 80s linear infinite}.x3{left:-250px;top:-200px;transform:scale(1.2);opacity:.8}.x4{left:470px;top:-250px;transform:scale(.75);opacity:.75;animation:moveclouds 60s linear infinite}.x4,.x5{margin-left:2200px}.x5{left:-650px;top:-150px;transform:scale(.8);opacity:.6;animation:moveclouds 44s linear infinite}@keyframes moveclouds{0%{margin-left:1400px;opacity:0}10%{opacity:1}to{margin-left:-1000px}}