Awan akatsuki CSS3

CSS :
#akatsuki-cloud {position: absolute; z-index: 0; width:100%; margin-top: 0px; height: 0px;} .akatsuki-cloud { width: 200px; height: 138px; background:url("https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgElfEGNoPYLeItYEZmsUrlNHUKrHmc5Xs8-4VPwhT66pQV12WI3h_I5wy6C9USbjXu5q3oIBs7nlwNja6dw6J69PSEvyIQYwFoeYj7Cj7wYWA7ZhLsgWaP3B1rWJjULR7yl6ivI8WzBhk/s1600/cloud-akatsuki-ngeposta.png") no-repeat top center; position: relative; } .ngeposta-cloud1 { -webkit-animation: moveclouds2 15s linear infinite; -moz-animation: moveclouds2 15s linear infinite; -o-animation: moveclouds2 15s linear infinite; } .ngeposta-cloud2 { left: 200px; -webkit-transform: scale(0.6); -moz-transform: scale(0.6); transform: scale(0.6); opacity: 0.6; -webkit-animation: moveclouds2 25s linear infinite; -moz-animation: moveclouds2 25s linear infinite; -o-animation: moveclouds2 25s linear infinite; } .ngeposta-cloud3 { left: -250px; top: -200px; -webkit-transform: scale(0.8); -moz-transform: scale(0.8); transform: scale(0.8); opacity: 0.8; -webkit-animation: moveclouds2 20s linear infinite; -moz-animation: moveclouds2 20s linear infinite; -o-animation: moveclouds2 20s linear infinite; } .ngeposta-cloud4 { left: 470px; top: -250px; -webkit-transform: scale(0.75); -moz-transform: scale(0.75); transform: scale(0.75); opacity: 0.75; -webkit-animation: moveclouds2 18s linear infinite; -moz-animation: moveclouds2 18s linear infinite; -o-animation: moveclouds2 18s linear infinite; } .ngeposta-cloud5 { left: -150px; top: -150px; -webkit-transform: scale(0.8); -moz-transform: scale(0.8); transform: scale(0.8); opacity: 0.8; -webkit-animation: moveclouds2 20s linear infinite; -moz-animation: moveclouds2 20s linear infinite; -o-animation: moveclouds2 20s linear infinite; } @-webkit-keyframes moveclouds2 { 0% {margin-left: 1000px;} 100% {margin-left: -1000px;} } @-moz-keyframes moveclouds2 { 0% {margin-left: 1000px;} 100% {margin-left: -1000px;} } @-o-keyframes moveclouds2 { 0% {margin-left: 1000px;} 100% {margin-left: -1000px;} }
HTML :
<div id='akatsuki-cloud'><div class='akatsuki-cloud ngeposta-cloud1'></div><div class='akatsuki-cloud ngeposta-cloud2'></div><div class='akatsuki-cloud ngeposta-cloud3'></div><div class='akatsuki-cloud ngeposta-cloud4'></div><div class='akatsuki-cloud ngeposta-cloud5'></div></div>
Contone :