11. Repeat at the other end. The outlined of the model should be a diamond shape.
12. Turn the model over. And fold in half. Bringing the two sharp points together. Allow to unfold.
13. Allow the flaps folded in steps 10-11 to open out slightly. Completing the unit, which now appears three dimensional. Make another 29 units in the same way.
14. Take any two units. Slide the point of one unit into the central slit in the diamond-shaped face of the other.
15. Two units assembled.
16. Assemble a three-unit cluster, by adding a third unit in the same way. You will now also need to connect the third unit to the first. This requires swiveling the construction into position to allow these locks to be performed.
17. When more units are added. You will notice that a ring of any five points forms a pentagonal star. As shown.
18. Near to completion. Continue to lock the unit as before.
Fold the lower right sloping edge upward to lie along the vertical center crease.