Four districts in a four by four city, black on white
- Grid
- 13 × 9
- Colour
- black on white
- Paper
- Canson XL Bristol, A4
- Pen
- black pigmented fineliner
- Dimensions
- 27.5 × 19 cm
16 neighbourhoods are divided in four districts of four neighbourhoods each
117 unique possible configurations in a 13x9 grid (eg. https://oeis.org/A172477)






