title: Write text on background-image
body: <p>I try to make an image for a whole site. It works! But I need something more, I try to make site on this image. I need to make divs on it. I try to do it that: </p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;html lang="PL-pl"&gt;
  &lt;head&gt;
   &lt;meta charset="utf-8"&gt;
   &lt;title&gt;EU-Trans system&lt;/title&gt;
   &lt;style&gt;
    html{
     background: url('http://monster.pwoj.pl/images/main_background.jpg') no-repeat center center fixed; 
     -webkit-background-size: cover;
     -moz-background-size: cover;
     -o-background-size: cover;
     background-size: cover;
    }
   &lt;/style&gt;
   &lt;link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"&gt;
   &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"&gt;&lt;/script&gt;
   &lt;script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"&gt;&lt;/script&gt;
   &lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
  &lt;/head&gt;
  &lt;body&gt;
   &lt;div class="container-fluid"&gt; 
    &lt;div class="row"&gt;
     ASDF
    &lt;/div&gt;
   &lt;/div&gt;
  &lt;/body&gt;
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>But there is white background in the div place. How to remove it? </p>