CodePen

HTML

            
              <html>
  <body>
    <h1>placeholder heading</h1>
    <p>random text</p>
  </body>
</html>
            
          
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↑ Insert the most common viewport meta tag

CSS

            
              body{
  @include background-size(cover);
  background-image: url(http://lorempixel.com/output/city-q-c-1280-1024-10.jpg);
  background-repeat: no-repeat;
  background-position: center center;
  background-attachment: fixed;
}
            
          
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JS

            
              
            
          
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