title: How is the loading script on this website implemented?
body: <p>I found this wonderful website that have a loading bar on top of the page. The loading bar is like the browser's loading bar, but I find it very nifty and want to implement it as well in my pages.</p>
  
  <p><a href="https://i.stack.imgur.com/HCWww.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HCWww.jpg" alt="alt text"></a>
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  <p><a href="http://www.cssjockey.com/" rel="nofollow noreferrer">http://www.cssjockey.com/</a></p>