<style>
#background {
background: url("https://64.media.tumblr.com/0ae8cdecc88e5d6829517b774df850e8/5861ae74383185b1-93/s1280x1920/ad33281c4be14a91cd7587a64373c28db3eeeae0.jpg");
position: fixed;
height: 100%;
width: 100%;
left: 0;
top: 0;
z-index: -99;
}
</style>
<div id="background">
</div>