Coding Challenge : One line challenge

Hi dear coders,

I have a new challenge for you ;)
The goal is simple, like the title.

With one line of code! and iterations, you have to draw a beautifull canvas full of colors and goemetric patterns.
The only line of code must calculate the color of each pixel.

To show what i'm talking about, here is a few exemples made by children...
[https://scratch.mit.edu/studios/2825709/](https://scratch.mit.edu/studios/2825709/)

So, what are you wainting for, let's made the best canvas :)

Maybe it can be a topic for one of @shiffman 's videos...