title: How to set a image pattern and color gradients as background
body: <p>I see modern sites putting a color gradient + pattern as the page background.
  You may take a look at the 'jumbotron' class of twitter bootstrap site  <a href="http://twitter.github.com/bootstrap/index.html" rel="nofollow">here</a>.</p>
  
  <pre><code>.jumbotron {
      position: relative;
      padding: 40px 0;
      color: #fff;
      text-align: center;
      text-shadow: 0 1px 3px rgba(0,0,0,.4), 0 0 30px rgba(0,0,0,.075);
      background: #020031;
      background: -moz-linear-gradient(45deg, #020031 0%, #6d3353 100%);
      background: -webkit-gradient(linear, left bottom, right top, color-stop(0%,#020031), color-stop(100%,#6d3353));
      background: -webkit-linear-gradient(45deg, #020031 0%,#6d3353 100%);
      background: -o-linear-gradient(45deg, #020031 0%,#6d3353 100%);
      background: -ms-linear-gradient(45deg, #020031 0%,#6d3353 100%);
      background: linear-gradient(45deg, #020031 0%,#6d3353 100%);
      filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#020031', endColorstr='#6d3353',GradientType=1 );
      -webkit-box-shadow: inset 0 3px 7px rgba(0,0,0,.2), inset 0 -3px 7px rgba(0,0,0,.2);
      -moz-box-shadow: inset 0 3px 7px rgba(0,0,0,.2), inset 0 -3px 7px rgba(0,0,0,.2);
      box-shadow: inset 0 3px 7px rgba(0,0,0,.2), inset 0 -3px 7px rgba(0,0,0,.2);
  }
  
  .jumbotron::after {
      content: '';
      display: block;
      position: relative; /* changed by me */
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      background: url(../img/bs-docs-masthead-pattern.png) repeat center center;
      opacity: .4;
  }
  </code></pre>
  
  <p>What I need is to create, say 10 classes like above each pointing to different image patterns. I should be able to use these CSS classes to give 10 different patterns to each of the thumbnails in the gallery.</p>
  
  <p>When I set the jumbotron class to any of the thumbnail, it stretches out the whole page.</p>
  
  <p>is this possible?</p>