<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
body{
background: #f2f2f2 url("red.png") no-repeat fixed center;
animation: myAnimation 5s infinite;
-webkit-animation: myAnimation 5s infinite; /* Safari 4.0 - 8.0 */
}
@keyframes myAnimation {
50% {background: #f2f2f2 url("yellow.png") no-repeat fixed center; }
}
/* Safari 4.0 - 8.0 */
@-webkit-keyframes myAnimation {
50% {background: #f2f2f2 url("yellow.png") no-repeat fixed center; }
}
</style>
</head>
<body>
<h1>CSS Animatable background</h1> </body>
</html>