On the 8th of March, 2011,
we planned a convex city

Convex City Plan

The idea of this workshop was to create a big intriguing colored pattern for renovated houses with white walls. The size was therefore as big as the table. This time we also didn't want to use a pen, we used old big letraset stickersheets instead.


  • Every player receives one color sticker sheet.
  • The growing pattern consists of branches - of which each branch is created with a pair of three polygons - one of each color.

In turns:

  • Cut a convex quadrilateral (a polygon with four sides) from the sticker sheet
  • Attach it to an existing quadrilateral.
  • Attach it so that a pair of three quadrilateras forms together one edge that is as straight as possible.
  • A branch must not contain more than one quadrilateral of each color.