Guilloché
Banknote-style rosette: bands of phase-shifted waves woven into a mesh.
Pens
Bands and their interwoven threads share the pens. Starts with 4 pens and works with anywhere from 1 to 8.
Settings
Bands, Lines per band, Waves (outer band), Wave shape, Loops, Gap between bands, Band width taper, Core radius, Outer lobes, Outer depth, Inner lobes, Inner depth, Band twist°, Central rosette, Rosette petals, Smoothness.
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.