If not every patch is different, use strips to make them. You will need 2 sets: one set of strips using 2 colors: A,B, A;
a second set should use the same colors but in different sequence B, A, B. Sew them, press them, and then slice across each strip to make the size squares you need. Sew them together then, using ABA, BAB, ABA. The next block should be BAB, ABA, BAB. Hope this makes sense.