很酷的光线滚动效果

今天看到一个国外的网站有这么个效果，很好奇如何实现的，研究了一番，将效果实现了，很酷，不用任何图片

http://abemedia.co.uk/content-management-systems-cms

<style type="text/css">
    @-webkit-keyframes rotate1 {
        from { -webkit-transform: rotate(0deg); }
        to	{ -webkit-transform: rotate(20deg); }
    }
</style>
<div style="height: 1000px; background-color: #23869D; overflow: hidden;">
    <div style="padding-top:2180px; margin:-2000px 0 0 -2000px; 4000px; height: 4000px;-webkit-animation-name: rotate1; -webkit-animation-duration: 2s; -webkit-animation-iteration-count: infinite; -webkit-animation-timing-function: linear;box-sizing: border-box;">
    <div style="border-180px 2000px;box-sizing: border-box; margin:-360px 0 0 0; -webkit-transform: rotate(20deg);  0; height: 0; border-style:solid; border-color:transparent rgba(255,255,255,.1);"></div>
    <div style="border-180px 2000px;box-sizing: border-box; margin:-360px 0 0 0; -webkit-transform: rotate(40deg);  0; height: 0; border-style:solid; border-color:transparent rgba(255,255,255,.1);"></div>
    <div style="border-180px 2000px;box-sizing: border-box; margin:-360px 0 0 0; -webkit-transform: rotate(60deg);  0; height: 0; border-style:solid; border-color:transparent rgba(255,255,255,.1);"></div>
    <div style="border-180px 2000px;box-sizing: border-box; margin:-360px 0 0 0; -webkit-transform: rotate(80deg);  0; height: 0; border-style:solid; border-color:transparent rgba(255,255,255,.1);"></div>
    <div style="border-180px 2000px;box-sizing: border-box; margin:-360px 0 0 0; -webkit-transform: rotate(100deg);  0; height: 0; border-style:solid; border-color:transparent rgba(255,255,255,.1);"></div>
    <div style="border-180px 2000px;box-sizing: border-box; margin:-360px 0 0 0; -webkit-transform: rotate(120deg);  0; height: 0; border-style:solid; border-color:transparent rgba(255,255,255,.1);"></div>
    <div style="border-180px 2000px;box-sizing: border-box; margin:-360px 0 0 0; -webkit-transform: rotate(140deg);  0; height: 0; border-style:solid; border-color:transparent rgba(255,255,255,.1);"></div>
    <div style="border-180px 2000px;box-sizing: border-box; margin:-360px 0 0 0; -webkit-transform: rotate(160deg);  0; height: 0; border-style:solid; border-color:transparent rgba(255,255,255,.1);"></div>
    <div style="border-180px 2000px;box-sizing: border-box; margin:-360px 0 0 0; -webkit-transform: rotate(180deg);  0; height: 0; border-style:solid; border-color:transparent rgba(255,255,255,.1);"></div>
    </div>
</div>