JSFiddle - React, Tailwind, and code Playground

HTML

<div class="iphonebackground">
  <div class="screenbackground"></div>
</div>

CSS

.iphonebackground, .screenbackground {
    background-image:url("http://chpwn.com/apps/iphone-frame.png");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100% 100%;
    height:400px;
}

.screenbackground {
    background-image:url("https://dl.dropbox.com/u/290586/iphone-bg.png");
}