6. Valley-fold the triangular corner
7. Valley-fold the triangular flap up. Turn the model over.
8. Valley-fold the right triangular corner.
9. Valley-fold the triangular flaps up.
10. Valley-fold the bottom half up. Repeat behind.
11. Inside reverse-fold the left and right corners.
12. Swing down the top layer of the model, making it curve. Repeat behind.
