How to make a long origami stairs

(page 5)

7th picture of long origami stairs

07.

Apply four vertical "valley-folds" of the step #6 and then "unfold" .

Prepare to apply eight horizontal "valley-folds" and then "unfold" .

8th picture of long origami stairs

08.

Apply eight horizontal "valley-folds" of the step #7 and then "unfold" .

Prepare to apply eight vertical "valley-folds" and then "unfold"