Times Table
Chords from i to i·k around a circle: cardioids, nephroids and their moiré.
Pens
Colors follow the chord sequence, with the boundary on pen 1. Starts with 3 pens and works with anywhere from 1 to 8.
Settings
Points, Multiplier k, Drawing, Circle outline, Start angle°, Layers, Δ per layer.
The preview uses the default settings on A4. Press R in the app for random variations. The SVG export is in millimetres with one Inkscape layer per pen, so it works with the AxiDraw extension, vpype and saxi.