- Fold the square in half twice.
- Fold, lowering one side to the vertical line of inflection, and the bottom to the horizontal line. Cut strips.
- Lower the top side to the inflection line.
- Turn over.
- Lower the side to the inflection line.
- Open and flatten your pocket.
- Fold the second side, revealing a pocket.
- Fold corners.
- Connect the parts as in the first embodiment (Figures 5-7)
- In the center of two faces, the corners of the parts are intertwined.


Roof
- Fold the square twice with a book. Fold the top in half and cut the strip.
- Lower the sides to the inflection line. Turn over.
- Lift the bottom to the inflection line.
- Open and flatten your pockets. Turn the part.
- While lowering the second side, flatten your pocket.
- When bending the part in half, tuck on each side a corner into the other.

