<html>
<head>
<style>
#myDIV {
height: 100px;
background-color: coral;
color: white;
animation: mymove 5s infinite;
}
@keyframes mymove {
50% {height: 500px;}
}
</style>
</head>
<body>
<h1>Animation of height</h1>
<p>Gradually change the height of the DIV element from 100px to 500px, and back to 100px:<p>
<div id="myDIV">
<h1>My DIV</h1>
</div>
</body>
</html>