[CODE]<!DOCTYPE html>
<html>
<head>
<style>
/* Inspirated from http://www.alessioatzeni.com/wp-content/tutorials/html-css/CSS3-loading-animation-loop/index.html */
.ouro {
position: relative;
display:inline-block;
height: 46px;
width: 46px;
margin: 1em;
border-radius: 50%;
background: none repeat scroll 0 0 #DDDDDD;
overflow:hidden;
box-shadow: 0 0 10px rgba(0,0,0,.1) inset, 0 0 25px rgba(0,0,255,0.075);
}
.ouro:after {
content: "";
position: absolute;
top: 9px; left: 9px;
display: block;
height: 28px; width: 28px;
background: none repeat scroll 0 0 #F2F2F2;
border-radius: 50%;
box-shadow: 0 0 10px rgba(0,0,0,.1);
}
.ouro > span {
position: absolute;
height: 100%; width: 50%;
overflow: hidden;
}
.left { left:0 }
.right { left:50% }
.anim {
position: absolute;
left: 100%; top: 0;
height: 100%; width: 100%;
border-radius: 999px;
background: none repeat scroll 0 0 #508EC3;
opacity: 0.8;
-webkit-animation: ui-spinner-rotate-left 3s infinite;
animation: ui-spinner-rotate-left 3s infinite;
-webkit-transform-origin: 0 50% 0;
transform-origin: 0 50% 0;
}
.left .anim {
border-bottom-left-radius: 0;
border-top-left-radius: 0;
}
.right .anim {
border-bottom-right-radius: 0;
border-top-right-radius: 0;
left: -100%;
-webkit-transform-origin: 100% 50% 0;
transform-origin: 100% 50% 0;
}
/* v2 */
.ouro2 .anim {
-webkit-animation-delay:0;
animation-delay:0;
}
.ouro2 .right .anim{
-webkit-animation-delay: 1.5s;
animation-delay: 1.5s;
}
/* v3 */
.ouro3 .anim {
-webkit-animation-delay: 0s;
-webkit-animation-duration:3s;
-webkit-animation-timing-function: linear;
animation-delay: 0s;
animation-duration:3s;
animation-timing-function: linear;
}
.ouro3 .right .anim{
-webkit-animation-name: ui-spinner-rotate-right;
-webkit-animation-delay:0;
-webkit-animation-delay: 1.5s;
animation-name: ui-spinner-rotate-right;
animation-delay:0;
animation-delay: 1.5s;
}
/* round variation */
.round .ouro:after {display:none }
/* double variation */
.double .ouro:after {
height: 13px; width: 13px;
left: 7px; top: 7px;
border: 10px solid #ddd;
background: transparent;
box-shadow: none;
}
@keyframes ui-spinner-rotate-right{
0%{transform:rotate(0deg)}
25%{transform:rotate(180deg)}
50%{transform:rotate(180deg)}
75%{transform:rotate(360deg)}
100%{transform:rotate(360deg)}
}
@keyframes ui-spinner-rotate-left{
0%{transform:rotate(0deg)}
25%{transform:rotate(0deg)}
50%{transform:rotate(180deg)}
75%{transform:rotate(180deg)}
100%{transform:rotate(360deg)}
}
@-webkit-keyframes ui-spinner-rotate-right{
0%{-webkit-transform:rotate(0deg)}
25%{-webkit-transform:rotate(180deg)}
50%{-webkit-transform:rotate(180deg)}
75%{-webkit-transform:rotate(360deg)}
100%{-webkit-transform:rotate(360deg)}
}
@-webkit-keyframes ui-spinner-rotate-left{
0%{-webkit-transform:rotate(0deg)}
25%{-webkit-transform:rotate(0deg)}
50%{-webkit-transform:rotate(180deg)}
75%{-webkit-transform:rotate(180deg)}
100%{-webkit-transform:rotate(360deg)}
}
/*
* Some bugs with Chrome (Android), Safari and Opera, I'll try to see how http://atomeye.com/projects/sass-css-spinner.html made his code.
*/
/* presentation styles */
html {height: 100%}
body { text-align:center; background: radial-gradient(circle, #fff 0%, #bbb 85%) no-repeat; background: -webkit-radial-gradient(circle, #fff 0%, #bbb 85%) no-repeat; height: 100%; display:table; width:100%}
.block {display: table-cell; vertical-align:middle}
h1, a { margin-top: 1em; font-family: "Open Sans Light", "Open Sans", "Segoe UI", Helvetica, Arial; color: #888; font-weight: lighter;}
.info {margin-top: 25px}
.info a {font-size: 12px; color: #999}
.info br + a {text-decoration:none}
</style>
</head>
<body>
<div class="block">
<h1>OuroboroCSS</h1>
<p class="circle">
<span class="ouro">
<span class="left"><span class="anim"></span></span>
<span class="right"><span class="anim"></span></span>
</span>
<span class="ouro ouro2">
<span class="left"><span class="anim"></span></span>
<span class="right"><span class="anim"></span></span>
</span>
<span class="ouro ouro3">
<span class="left"><span class="anim"></span></span>
<span class="right"><span class="anim"></span></span>
</span>
</p>
<p class="round">
<span class="ouro">
<span class="left"><span class="anim"></span></span>
<span class="right"><span class="anim"></span></span>
</span>
<span class="ouro ouro2">
<span class="left"><span class="anim"></span></span>
<span class="right"><span class="anim"></span></span>
</span>
<span class="ouro ouro3">
<span class="left"><span class="anim"></span></span>
<span class="right"><span class="anim"></span></span>
</span>
</p>
<p class="double">
<span class="ouro">
<span class="left"><span class="anim"></span></span>
<span class="right"><span class="anim"></span></span>
</span>
<span class="ouro ouro2">
<span class="left"><span class="anim"></span></span>
<span class="right"><span class="anim"></span></span>
</span>
<span class="ouro ouro3">
<span class="left"><span class="anim"></span></span>
<span class="right"><span class="anim"></span></span>
</span>
</p>
<p class="info"><a href="http://en.wikipedia.org/wiki/Ouroboros">Why the name OuroboroCSS?</a><br /><a href="http://twitter.com/geoffrey_crofte">by @geoffrey_crofte</a></p>
</div>
</body>
</html>[/CODE]
