Code panel (Simply)

    viewport contentwidthdevice-width, initial-scale1.0
    http-equivContent-Type contenttext/html; charsetUTF-8 />
    css/styles.css stylesheet mediascreen text/css
 
   titleSliding Tiles Puzzle</title
</head

<pre><code>
    viewport contentwidthdevice-width, initial-scale1.0
    http-equivContent-Type contenttext/html; charsetUTF-8 /&gt;
    css/styles.css stylesheet mediascreen text/css

   titleSliding Tiles Puzzle&lt;/title
&lt;/head
</code></pre>