Member's 2 and 3 both uploaded a profile photo. That triggered the script to automatically replace Dolphin's standard cover image with one of many random images controlled by Admin.
In this example, there are over 30 images. Just jump between Member 2 and member 3's profiles to see how the images change.
You can also click one of the member's buttons above repeatedly to see the results. (Note: The cover images for Members 1 and 4 remain static)
The end result is a vibrant profile with a colourful cover, compared to Dolphin's standard cover.
Admin's can create any images they like, as often as they like and full instructions are supplied in the tutorial.