Make a few cuts on each vertical triangle of the tree. Fold down from the top of each cut so that the fold makes a triangle. Once you've cut and folde...
Step 2: Fold
Fold your tree-to-be triangularly three times, as in the first picture. Without unfolding, fold it again as in the second picture. When you unfold, your square should be divided by 8 (16) radial creases.
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