Kippah for my Chinese friend

This morning my friend & neighbor Hao sent me a link to this New York Times article about Jewish girls adopted from China. There's a great photo of the hakafah from one girl's bat mitzvah, and you can see the men wearing yin-yang kippot. I've crocheted and knitted kippot before, and I'd like to make a yin-yang one for Hao.


Photo taken by James Estrin & published in the NY Times

Anybody know a good pattern for making that swirl? I'd like to get started this weekend so it might be ready in time for Passover. I could chart it out myself, but I'd rather not.