"Sierpinski" Challenge

Welcome to an exciting challenge regarding fractals! A single source code written in ugBASIC reproduces the famous Sierpinski triangle on many different 8 bit retro computers like ATARI 400/800, Commodore 64, Commodore PLUS/4, ZX Spectrum 48K, Dragon 32/64, Thomson MO6 (standard and U, V, W series), Olivetti Prodest PC128, Thomson MO5 (standard and QW, E, 5E, DE, 5N, 5NR series), MSX, SEGA SC-3000…