css3 loading 效果1

 

代码:

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
#box{position: relative;margin: 100px;}
#box span{
    display: block;
    width: 9px;
    height: 5px;
    position: absolute;
    bottom: 0;
    background-color: #9b59b6;
    -webkit-animation:preloader 1.0s infinite ease-in-out;
}
#box span:nth-child(2){left: 11px;-webkit-animation-delay:0.2s;}
#box span:nth-child(3){left: 22px;-webkit-animation-delay:0.4s;}
#box span:nth-child(4){left: 33px;-webkit-animation-delay:0.6s;}
#box span:nth-child(5){left: 44px;-webkit-animation-delay:0.8s;}
@-webkit-keyframes preloader{
    0%{height: 5px;transform:translateY(0px);background-color: #9b59b6;}
    25%{height: 35px;transform:translateY(15px);background-color: #3498db;}
    50%{height: 5px;transform:translateY(0px);background-color: #9b59b6;}
    100%{height: 5px;transform:translateY(0px);background-color: #9b59b6;}
}
</style>
</head>
<body>
    <div id="box">
        <span></span>
        <span></span>
        <span></span>
        <span></span>
        <span></span>
    </div>
</body>
</html>

效果图:

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