代码编辑器：
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<meta charset="utf-8"><link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> 3
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<style> 5
#myDIV {6
height: 200px;7
background-color: lightblue;8
animation: mymove 5s infinite; /* Chrome, Safari, Opera */9
animation: mymove 5s infinite;10
}11
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/* Chrome, Safari, Opera */13
@-webkit-keyframes mymove {14
50% {margin: 50px;}15
}16
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/* Standard syntax */18
@keyframes mymove {