XF 2.0 Issue with Particle Background

[iamjudd]

Using this: https://github.com/jnicol/particleground

Above </head> in PAGE_CONTAINER:

<script type='text/javascript' src='js/particles/jquery.particleground.js'></script>
<script type='text/javascript' src='js/particles/particles.js'></script>

Below <div class="p-body">:

<div id="particles"></div>

Result:

Probably something stupid I'm missing.