Betta Genetics Example: Black HMPK x Blue HMPK

I put together a small diagram showing an example of line breeding. The goal is a blue-based superblack halfmoon plakat, starting with a black male from a solid line, and a blue female from a solid line. Once you breed the two, you have a spawn that are 100% blue with the black genotype, and once you breed the best female F1 back to her father, you should get around 50% black and 50% blue with black genotype. Hope this makes sense for everyone!!