Dror Bar-Natan's Image Gallery:Symmetry:Tilings:The *2222 Group

A fence on Arch Street
A fence on Arch Street, Berkeley, March 2000.
A garage door on Spruce Street
A garage door on Spruce Street, Berkeley, April 2000.
A car's front grill
A car's front grill, Berkeley, April 2000.
Sister in law's shirt
My sister in law's shirt, Jerusalem October 2000.

A rectangle

The quotient orbifold for the group *2222 is a disk with four order 2 corners on its (reflecting) boundary - that is, it is a rectangle made of a transparent material.