Fedul,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
li {
color: #FFFFFF;
background-color: #0000CD;
width: 10px;
transition: .8s all ease-in-out;
}
.animated{
width: 200px;
}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script>
$(function(){
var a = $.makeArray($("ul > li"));
function fn()
{
$.each(a.reverse(),function(i, e){
setTimeout(function(){
$(e).toggleClass('animated');
i + 1 == a.length && setTimeout(fn,1000);
}, i * 200)
})
}
fn()
});
</script>
</head>
<body>
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</body>
</html>