Mostly I used Adobe Illustrator, building up the shapes and exporting as CSV. I also did some hand-editing of the SVGs in Sublime for fine tuning, SVGs are just

Mostly I used Adobe Illustrator, building up the shapes and exporting as CSV. I also did some hand-editing of the SVGs in Sublime for fine tuning, SVGs are just XML so it's not difficult to adjust colors or nudge nodes in a text editor.