I’ve found that OpenSCAD is really good for producing 2d designs in a very small amount of code. Here are three examples to play with:
Diagonal Section through Menger sponge (SVG) (OpenSCAD source) — this may take a while to render, as it’s making a Menger sponge in 3D and then slicing through it to make the projection.
(If you take out the projection() clause, it looks like this in 3D:
)
Pattern from Ak Medrese, Nigde, Turkey (SVG) (OpenSCAD source) — design after a construction by Eric Broug.
Basis of a pattern from the Alhambra (SVG) (OpenSCAD source)