Spirograph: the most advanced Spirograph simulator on Scratch. Variable functions: Rotations: how many pen steps the tool makes. Note: increasing rotations also increases render time, so it might lag a bit. R: the radius of the outer circle r: the radius of the inner circle h: The distance of the tracing point from the center of the inner circle Sample rate: how many steps the pen moves before recalculating. For traditional patterns, set to 1. Pen size: line width (or pen size :) Fun fact: with this simulator, you can make 800,000,000 (eight hundred million) unique patterns (8 trillion if you count pen size and rotations). Comment your favorite settings! I used ChatGPT to help figure out the math. Everything else is by me.