[up to this 3D shape]
- Start from
- Close into a 2x2 square with stacks of three tiles in positions North-West and South-East,
a single tile at first floor in position North-East and a single tile at third floor in position
South-West of type slash
- Open in 3D with the following hingings
- South side for the top two tiles in the North-West stack (giving rise to a flap)
- West side for the bottom two tiles in the North-West stack
- South side for the the top two tiles in the South-East stack
- West side for the bottom two tiles in the South-East stack
- Open in the final shape
