Modified garter repeats to be 18 rows with the stockinette strips in between as 6 rows. The tricolor stripes are 6 rows of each color.

Got super sick of this project by the time I started the tricolor stripes. I had originally intended to do 6 of those, but just couldn’t stand it. Luckily the modification to larger stripes meant the blanket came out a nice length even without those stripes.