Click on the link below to play the video tutorial. Below you will find the source code from the tutorial. Edit the code in this screen or copy and paste this into an editor to follow along with the video lesson. Play around with the code to ensure you understand the concept.

<iframe width=”560″ height=”315″ src=”//” frameborder=”0″ allowfullscreen></iframe>
<a class=”jsbin-embed” href=”,output”>JS Bin</a><script type=”text/javascript” src=””></script>