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<!DOCTYPE html>
<html>
<head>
<style> 
#main {
    width: 400px;
    height: 150px;
    border: 1px solid #000000;
    display: flex;
}

#main div {
    width: 70px;
    height: 70px;
}

#myGreenDIV {
    -webkit-animation: mymove 5s infinite; /* Chrome, Safari, Opera */
    animation: mymove 5s infinite;
}

/* Chrome, Safari, Opera */
@-webkit-keyframes mymove {
    50% {order: 6;}
}

/* Standard syntax */
@keyframes mymove {
    50% {order: 6;}
}
</style>
</head>
<body>

<p>Change the order of the green DIV element, 1 to 6 and back to 1:<p>
<div id="main">
  <div style="background-color:lightgreen;order:1;" id="myGreenDIV"></div>
  <div style="background-color:coral;order:2;"></div>
  <div style="background-color:lightblue;order:3;"></div>
  <div style="background-color:pink;order:4;"></div>
</div>

<p>The order property is <em>animatable</em> in CSS.</p>
<p><strong>Note:</strong> Animation of the order property is not supported in Chrome.</p>
<p><strong>Note:</strong> CSS Animations do not work in Internet Explorer 9 and earlier versions.</p>

</body>
</html>