Watch out for bias edges on the outside of the block. It'd be safer with setting and corner triangles (the outer white pieces), but I'm not sure if that's beyond your skill level right now. The pattern is available, but not by itself...only in books with other KCS block patterns.
https://www.pickledishstore.com/categories.php?CID=105 (24.95 for 25 blocks - vol 8)
http://www.quilterbydesign.com/kansascitystar.html (15.95 for 99 blocks - vol 4)