The Braided Paper, designed by J C Nolan, is a very beautiful origami to fold. It does require some practise to fold it and one that I had tried when I was just a beginner in origami and failed.. It was quite some time after that that I tried another of J C Nolan’s design, Andrea’s Rose. Now I finally had enough confidence to give Braided Paper another try. And I did it! It is such a beautiful design that I am thrilled that I finally managed to do it! 
I loved the paper that I used for this design, the same banana paper that I had used for Floral Top. The paper is crisp and thin but strong and very good for folding this model.
A square of 8 inches are higher would be ideal when trying this design for the first time. Anything smaller would lead to a lot of frustration when making the reverse and pleat-sink folds for the model.
Model Details:
Model: Braided Paper
Creator: J C Nolan
Book: Creating Origami
Author: J C Nolan
Classification: Origami
Difficulty Level: High Intermediate
Paper Ratio: Square
Paper Size: 9 inches
Diagram: Origami.com
can you tell me how to do step 6?
Step 6 is the sinking after creating the windmill base.
For this, you will need to valley fold, then mountain fold the corners to the center, as shown in the diagram.
Then open each corner and reverse the previous fold, so that a waterbomb is created in the middle of the model.
This video explains the sink very clearly. Hope this helps.