Spirograph
Hypotrochoids and epitrochoids — curves traced by a point on a rolling circle.
R (outer)
5
r (inner)
3
d (pen dist)
5
Type
Hypotrochoid
Epitrochoid
Color
Rainbow
Plasma
Cyan
Draw
Animate
x = (R-r)cos(t) + d·cos((R-r)t/r)