How to make an origami sun

(page 12)

21th picture of origami sun

21.

Turn the model over.

Make sure that you have a regular octagon.

If not, adjust the crease lines so that the shape resembes a regular octagon.

Prepare to turne the model over and then open the paper.

22th picture of origami sun

22.

Turn the model over and then open the paper.

Prepare to apply four "open sink-folds" on new crease lines that you have created from four valley-folds.

You need to study what "open sink-fold" is from the above link if you don't know what it is.