How to make a four-heart origami box (page 11)

 

19. Apply the "inside reverse-fold" of the step #18.   Prepare to apply two "mountain-folds" .

20. Apply two "mountain-folds" of the step #19.   Prepare to apply two "mountain-folds" and then unfold on the crease lines to make the surface smooth.

 

 

 

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