动画效果一：
html代码：
<div class="spinner"> <div class="rect1"></div> <div class="rect2"></div> <div class="rect3"></div> <div class="rect4"></div> <div class="rect5"></div></div>CSS代码：.spinner { margin: 100px auto; width: 50px; height: 60px; text-align: center; font-size: 10px;}.spinner > div { background-color: #67CF22; height: 100%; width: 6px; display: inline-block; -webkit-animation: stretchdelay 1.2s infinite ease-in-out; animation: stretchdelay 1.2s infinite ease-in-out;}.spinner .rect2 { -webkit-animation-delay: -1.1s; animation-delay: -1.1s;}.spinner .rect3 { -webkit-animation-delay: -1.0s; animation-delay: -1.0s;}.spinner .rect4 { -webkit-animation-delay: -0.9s; animation-delay: -0.9s;}.spinner .rect5 { -webkit-animation-delay: -0.8s; animation-delay: -0.8s;}@-webkit-keyframes stretchdelay { 0%, 40%, 100% { -webkit-transform: scaleY(0.4) } 20% { -webkit-transform: scaleY(1.0) }}@keyframes stretchdelay { 0%, 40%, 100% { transform: scaleY(0.4); -webkit-transform: scaleY(0.4); } 20% { transform: scaleY(1.0); -webkit-transform: scaleY(1.0); }}动画效果二：
HTML代码：<div class="spinner"></div>CSS代码：.spinner { width: 60px; height: 60px;
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