How to make a 2x2 matrix origami base

(page 2)

1st picture of 2x2 matrix origami base

01.

Start with the backside of the paper facing up.

Prepare to valley-fold in half horizontally and then unfold.

2nd picture of 2x2 matrix origami base

02.

Apply a horizontal valley-fold of the step #1 and then unfold.

Prepare to valley-fold in half vertically and then unfold.

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