Ever heard of Wolfram diagrams ? I did not, but saw a website about this. It is simple, make a picture with one line of pixels only. In the line are zero’s (black) or ones (white). Now, for the next line, decide each pixel’s color by a simple rule based on previous line. Like, make it a one if sum of neigboring pixels above is 2 or 1, else a 0.
This way, one can make beautiful pictures, like
If you want to make some yourself, download this simple program