How to make a closed origami cube IV

(page 16)

29th picture of closed origami cube IV

29.

Apply the horizontal "mountain-fold" of the step #28 for the 3rd time.

Prepare to rotate the origami cube model by 90 degrees.

30th picture of closed origami cube IV

30.

Rotate the origami cube model by 90 degrees.

Prepare to apply a horizontal "mountain-fold" for the last time.

If you have a difficulty in these steps, you are welcome to write a question below.