curtain reveal display

http://stackoverflow.com/questions/19638467/fixed-background-scroll-effect/

HTML

<div class="slide2">
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
    
</div>
<div class="slide1">
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
    <h1>CONTENT</h1> <br /><br />
</div>

CSS

* { margin: 0; padding: 0 }
.slide2 { 
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;  /* sets it below the other slides in the layer stack */
    
    width: 100%;
    background: #a00;
}
.slide1 {
    position: relative;
    z-index: 10;  /* sets it above .slide1  */
    margin-top: 100%; /* this pushes it below .slide1 in the scroll */
    height: 100%; /* full length slides */
    width: 100%;
    background: #0a0;
}