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<!DOCTYPE html>
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<html>
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<head>
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<style>
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div
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{
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width:100px;
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height:100px;
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background:red;
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position:relative;
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animation:mymove 5s infinite;
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-webkit-animation:mymove 5s infinite; /* Safari and Chrome */
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}
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​
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@keyframes mymove
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{
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0%   {top:0px; left:0px; background:red;}
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25%  {top:0px; left:100px; background:blue;}
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50%  {top:100px; left:100px; background:yellow;}
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75%  {top:100px; left:0px; background:green;}
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100% {top:0px; left:0px; background:red;}
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}