Practical JQuery queue animation demo

<!-- css -->ul{
    list-style: none;   
}
li{
    font-size: 25px;
    float: left;
    color:grey;
    position: relative;
    margin: 10px;
    opacity: 0;
    left: -200px;
}<!-- html --><ul>
    <li>欢</li><li>迎</li><li>来</li><li>到</li><li>这</li><li>里</li></ul><!-- js -->$("li").last().animate({
            opacity: &#39;1&#39;,
            left: &#39;200px&#39;
        },400,function fn(){
            $(this).prev().animate({
                opacity: &#39;1&#39;,
                left: &#39;200px&#39;
            },400,fn)
        })
        setTimeout(function(){
            $("li").last().animate({
                opacity: &#39;0&#39;,
                left: &#39;400px&#39;
            },400,function fn(){
                $(this).prev().animate({
                    opacity: &#39;0&#39;,
                    left: &#39;400px&#39;
                },400,fn)
            })
        },2500)