A fairly faithful port of an old Compute! Magazine Amiga BASIC fractal mountain generator to Python 3 and PyGame.
https://www.atarimagazines.com/compute/issue87/Fractal_Mountains_For_Amiga.php
Prerequisites: Python 3, PyGame.
Simply run from a shell prompt. Press Escape to exit, 's' to save a PNG of the current image into the current directory, or any other key to generate a new image.