Ajax Loader
HTML 
<!--
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<!--
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 @fileoverview: Simple CSS3-Transform Spiral :)
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 @author: denisx@denisx.ru (Denis Khripkov)
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 @site: http://denisx.ru
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 @date: 2013-04-15
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 @version: v1.01
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-->
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<script type="text/javascript" src="http://yandex.st/jquery/1.9.1/jquery.min.js"></script>
 
CSS 
body {
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body {
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  padding: 0 50%;
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}
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span {  
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  display: inline-block;
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  border-bottom: 1px solid;
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  -webkit-animation-iteration-count: infinite;
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  -webkit-animation-timing-function: linear;
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  -webkit-animation-duration: 10s;
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  -webkit-animation-name: flag_tail;
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  }
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@-webkit-keyframes flag_tail {
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  100% {-webkit-transform: rotate(360deg)}
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}
 
JavaScript 
$(function(){
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$(function(){
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  var MAX=20;
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  var n=MAX;
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  var div=$('<div/>');
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  for(var i=0; i<n; ++i){
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    var obj=$('<p/>').appendTo(div);
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    var m=MAX;
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    for(var i=0; i<m; ++i){
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      obj=$('<span/>',{
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        text: ' _ _ '
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      }).appendTo(obj);
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    }
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  }
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  div.appendTo('body');
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});
 

Some CSS3 Spiral

CSSDeck G+