title: Create hollow circle with Fabric.js
body: <p>How can I achieve a similar effect like <a href="http://jsfiddle.net/Hnw6a/1137/" rel="nofollow">http://jsfiddle.net/Hnw6a/1137/</a> using Fabric.js?</p>
  
  <p>I tried with <code>clipTo</code> but without luck.</p>
  
  <p>I want to update this script <a href="http://jsfiddle.net/kxjV5/" rel="nofollow">http://jsfiddle.net/kxjV5/</a> to accept 'hollow' circles</p>