How can I slide between sets of an unknown number of thumbnails?
<p>I've created a codepen: <a href="http://codepen.io/anon/full/FLCqj" rel="nofollow">http://codepen.io/anon/full/FLCqj</a></p>

<p>What I want to do is only show 9 thumbnails at a time. Then, I'll have previous and next buttons that will rotate through 9 images (max) at a time.</p>

<p>I've taken a look at some jquery plugins, but don't know where to start when it comes to writing a custom plugin.</p>

<p>I think even pseudo-code ideas at this point will be a huge help.</p>
