How to make a flat open-square origami box

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17th picture of flat open-square origami paper box

17.

Repeat the steps #6-14 to the 2nd corner.

Prepare to rotate the origami box model by 90 degrees.

18th picture of flat open-square origami paper box

18.

Rotate the origami box model by 90 degrees.

Prepare to repeat the steps #6-14 to the 3rd corner.

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