<html>
<head>
<style>
#myDIV {
background-color: lightblue;
animation: mymove 5s infinite;
}
@keyframes mymove {
50% {margin-bottom: 50px;}
}
</style>
</head>
<body>
<h1>Animation of margin-bottom</h1>
<p>Gradually change the margin-bottom from 0px to 50px, and back to 0px:<p>
<div id="myDIV">
This is my DIV element.
</div>
</body>
</html>