Up and down arrows adjust the radius. Right and left arrows rotate the gear. WASD adjust the number and depth of the gear teeth.. Space bar shifts the gear marker, so it's between two teeth.
This was just a sketchpad for creating a more accurate gear drawing function for my other gears project: https://scratch.mit.edu/projects/103889936/ With more accurate control of the radius of each gear, the number of teeth, and the depth of the teeth, I'll be able to let the user experiment with different gear ratios.
