🌀 Harmonograph

A harmonograph is a mechanical apparatus that employs pendulums to create a geometric image. The drawings created typically are Lissajous curves or related drawings of greater complexity. The devices, which began to appear in the mid-19th century and peaked in popularity in the 1890s, cannot be conclusively attributed to a single person, although Hugh Blackburn, a professor of mathematics at the University of Glasgow, is commonly believed to be the official inventor. — Wikipedia

Harmonograph simulator

🎯 All work and no play makes Jack a dull boy
🧠 Inspired by Harmonograph3D found on prettymathpics.com
🐍 A VPython version is available as well, see harmonograph.py
👉 Click with mouse to create another harmonograph!