Draws an astroid curve by painting a fixed point on a generating circle of radius 1/4 rolling within a steering circle of radius 1. (Project inspired by @juliomulero on Twitter.)
The astroid curve was first discussed by Bernoulli in 1691-92. It is a special kind of hypocycloid which is obtained when a point on a generating circle of radius 1/4 rolls within a steering circle of radius 1. More information: https://en.wikipedia.org/wiki/Hypocycloid https://en.wikipedia.org/wiki/Astroid
