by Mahyar Hosien Khani Edited by Jane Rosemarin modular diagrams intermediate This article is only accessible to current OrigamiUSA members. If you are a member, please login. Log in or register to post comments Comments May 24, 2021 - 6:10pm charlotte.shandley Is there a way for me to better understand what goes on in Step 10 that allows the fold in Step 11? May 26, 2021 - 3:40pm nate.noah.xm@gm... I'm pretty sure Step 10 is a closed sink. It might hard to understand because of the color confusion in Step 11 where there's no yellow supposed to be colored on one of the triangles, and cause of the lack of text instructions on Step 10. I hope this is fixed soon, but, this comment should be pretty helpful until it does get fixed! June 2, 2021 - 6:39pm jane.rosemarin Step 10 is a simple valley fold. The colors are correct except for the leftmost gray triangle in step 11, which should be yellow. The folding sequence was clear to me, but I know others have had trouble, so we will be editing the diagrams further.