03-24-2020, 04:37 AM
Nice colours, Ofnuts (hurt a little my old eyes). The net seems to be full of these curves and animations:
http://mathworld.wolfram.com/Spirograph.html
http://mathworld.wolfram.com/Hypotrochoid.html
http://mathworld.wolfram.com/Epitrochoid.html
https://www.mathcurve.com/courbes2d.gb/e...hoid.shtml
http://xahlee.info/SpecialPlaneCurves_di...ochoid.htm
http://xahlee.info/SpecialPlaneCurves_di...choid.html
http://mathworld.wolfram.com/Spirograph.html
http://mathworld.wolfram.com/Hypotrochoid.html
http://mathworld.wolfram.com/Epitrochoid.html
https://www.mathcurve.com/courbes2d.gb/e...hoid.shtml
http://xahlee.info/SpecialPlaneCurves_di...ochoid.htm
http://xahlee.info/SpecialPlaneCurves_di...choid.html