I know there is a pattern online with instructions ... so perhaps some more googling?
Also, there were some listed here on the QB ... not sure though, how much detail, other than the layout.
The nice thing is, that it is a pattern that is flexible, in that you can decide what size you want to make your finished star/wheel and size your squares accordingly as it is all squares sewing together.sewing are squares. (make HSTs first which are the same square size.