用碎片加载小方块实现简单的随机色块，直接上代码，如果你嫌麻烦，可以看demo：http://codepen.io/koringz/pen/QbZEwx
/**/js注释已删
<!DOCTYPE html><html><head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta charset="utf-8"> <title>koringz</title> <link rel="stylesheet" href="CSS/demo.css"></head><body> <div class="container"> <div class="main"> <div class="colorful"></div> </div> </div></body></html>
* { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box;}html { font-size: 10px; -webkit-tap-highlight-color: transparent;}body { margin: 0; padding: 0; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.42857143; color: #333; background-color: rgba(211,232,132,0.8);}.container { overflow: visible;}.main { position: relative; width: 90%; height:200px; margin:auto;}.colorful { overflow: visible; width: 100%; height: 100%;}.colorful > a { float: left; display: block; width: 50px; height: 50px; zoom:2;}.colorful > a:hover { -webkit-animation:infinite 2s ease-in-out start-roll; -moz-animation:infinite 2s ease-in-out start-roll; animation:infinite 2s ease-in-out start-roll;}@-webkit-keyframes start-roll{ 0% { -webkit-transform: rotate(0deg); /*Chrome*/ -moz-transform: rotate(0deg); /*火狐*/ -ms-transform: rotate(0deg); /*IE*/ transform: rotate(0deg); -webkit-transition: opacity .3s linear; transition: opacity .3s linear; opacity: .5; filter: alpha(opacity=50); zoom:1; } 50% { -webkit-transform: rotate(180deg); /*chrome*/ -moz-transform: rotate(180deg); /*火狐*/ -ms-transform: rotate(180deg); /*IE*/ transform: rotate(180deg); -webkit-transition: opacity 1s linear; transition: opacity 1s linear; opacity: 1; filter: alpha(opacity=100); zoom:2; } 100% { -webkit-transform: rotate(360deg); /*chrome*/ -moz-transform: rotate(360deg); /*火狐*/ -ms-transform: rotate(360deg); /*IE*/ transform: rotate(360deg); -webkit-transition: opacity .3s linear; transition: opacity .3s linear; opacity: .5; filter: alpha(opacity=50); zoom:1; }}@-moz-keyframes start-roll{ 0% { -webkit-transform: rotate(0deg); /*chrome*/ -moz-transform: rotate(0deg); /*火狐*/ -ms-transform: rotate(0deg); /*IE*/ transform: rotate(0deg); -webkit-transition: opacity .3s linear; transition: opacity .3s linear; opacity: .5; filter: alpha(opacity=50); } 50% { -webkit-transform: rotate(180deg); /*chrome*/ -moz-transform: rotate(180deg); /*火狐*/ -ms-transform: rotate(180deg); /*IE*/ transform: rotate(180deg); -webkit-transition: opacity 1s linear; transition: opacity 1s linear; opacity: .5; filter: alpha(opacity=50); } 100% { -webkit-transform: rotate(360deg); /*chrome*/ -moz-transform: rotate(360deg); /*火狐*/ -ms-transform: rotate(360deg); /*IE*/ transform: rotate(360deg); -webkit-transition: opacity .3s linear; transition: opacity .3s linear; opacity: .5; filter: alpha(opacity=50); }}@keyframes start-roll{ 0% { -webkit-transform: rotate(0deg); /*chrome*/ -moz-transform: rotate(0deg); /*火狐*/ -ms-transform: rotate(0deg); /*IE*/ transform: rotate(0deg); -webkit-transition: opacity .3s linear; transition: opacity .3s linear; opacity: .5; filter: alpha(opacity=50); } 50% { -webkit-transform: rotate(180deg); /*chrome*/ -moz-transform: rotate(180deg); /*火狐*/ -ms-transform: rotate(180deg); /*IE*/ transform: rotate(180deg); -webkit-transition: opacity 1s linear; transition: opacity 1s linear; opacity: .5; filter: alpha(opacity=50); } 100% { -webkit-transform: rotate(360deg); /*chrome*/ -moz-transform: rotate(360deg); /*火狐*/ -ms-transform: rotate(360deg); /*IE*/ transform: rotate(360deg); -webkit-transition: opacity .3s linear; transition: opacity .3s linear; opacity: .5; filter: alpha(opacity=50); }}(function (window) { var document = window.document; function on(elem, evtnm, eventhd) { var onevtnm = 'on' + evtnm; elem[onevtnm] = eventhd; } function grc() { var val = [], i = 0; while (++i <= 3) { val.push(Math.floor(Math.random() * 255)); } return 'rgb(' + val.join() + ')'; } function fbc() { var el = document.querySelectorAll('.colorful')[0], total = Math.floor(el.offsetWidth / 50) * Math.floor(el.offsetHeight / 50), df = document.createDocumentFragment(), a; while (total-- > 0) { a = document.createElement('a'); a.style.backgroundColor = grc(); df.appendChild(a); } el.appendChild(df); } on(window, 'load', function () { fbc(); });})(window)声明：原本想在@keyframe{}内部添加zoom属性放大，结果效果不显示放大，放外面可以放大，好搜搜了一下没有找到原因。当然其他方法也不是不行。
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