HTML/JAVASCRIPT Animation like on storj.io
<p>I found this site <a href="https://storj.io/" rel="nofollow">Storj.io</a>. I really like the design of the site and was looking at the header. There is a background-image and then on top of this there are those points that are moving. How can such a animation be achieved? Is this done with html5 and how or is JavaScript used?</p>