How to make a closed flat square origami box (page 9)

 

15. Apply the "inside reverse-fold" of the step #14.   Prepare to apply a "valley-fold" .

16. Apply the "valley-fold" of the step #15.   Prepare to apply a vertical "mountain-fold" .

 

 

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19