Untitled

dabblet.css

.section {
  height: 50%;
  width: 100%;
  min-height: 260px;
  position: relative;
  text-align: center;
  background: #FFF;
}
.cat {
  width: 100%;
  height: 100%;
  min-height: 260px;
  background-image: url(http://www.andrevv.com/_images/catz/catz01.gif);
  background-position: center bottom;
  background-attachment: fixed;
  background-repeat: no-repeat;
  -webkit-background-size: 50%;
  -moz-background-size: 50%;
  -o-background-size: 50%;
  background-size: 50%;
}

dabblet.html

<div class="section" style="background-color: green;">
  <div class="cat"></div>
</div>
<div class="section" style="background-color: red;">
  <div class="cat"></div>
</div>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"css"}