I know so many people out there have tried to make this style of afgan only to find that it buckles or puckers going up or down the points of the star. Well... I have great news. I will show you how to get your project to lay FLAT.
I have already done the first 3 rounds in the pattern but my instructions will help from 3rd round up. I think the first two rows are easy to understand.
I hope this makes sense to you. It will lay flat if you follow these instructions. Enjoy!