This particular image gallery was designed by Sean Harrington. It kind of looks like a Simon Says electronic game where you have a small arc of images and clicking on the previous or next button will load the next image in the series. Something like this will work great when you want to use it as an image slider or in your next website
If you are having trouble with the pen, try the archived copy on GitHub
Disc Image Slider Snippet
See the Pen 29/52 – Circular Slider by Sean (@nevernotsean) on CodePen.0