Daniel C was inspired by some artwork, so he programmed this in LOGO: http://www.j2e.com/stmarks/bwilliams/Daniel+Cs+ultimate+pattern/
It’s an example of a mathematical never-ending picture called a fractal.
A fractal is a never-ending pattern. Fractals are infinitely complex patterns that are self-similar across different scales. They are created by repeating a simple process over and over in an ongoing feedback loop.
I remixed it using variables here http://www.j2e.com/stmarks/bwilliams/Remix+Daniel+Cs+ultimate+pattern/
and made it into an animated GIF