CodePen

HTML

            
              <pre><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
  &lt;head&gt;
  &lt;/head&gt;</code></pre>
            
          
!

CSS

            
              pre {
  margin:25px;
}

code {
  font:normal normal 20px 'Inconsolata';
}
            
          
!

JS

            
              
            
          
!
999px
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