Let it run through the animation once so that it loads all the images, then watch to your heart's (eyes'?) content.
Made in Mandelbulb 3D. Mandelbulb 3D is this cool program which allows you to make different three-dimensional fractals and then animate them. For this, though, I just took a preset and set keyframes for one value. I'm really looking forward to working with this some more, although animations I make might end up too large to be able to be put onto Scratch, so I may have to just resort to making YouTube compilations of them instead. I'd still upload single pictures here, though. Also, due to my very limited knowledge of fractals and this program, I have no idea why there's a random sphere in the middle.