first thank you for thinking it was clever. As for changing colors that is done every round. Some of mine have the same color every other round some are random. If I have a lot of a color I use it every other round. the blocks that I have very little of a color are differnt colors every row. using the color with the least in the middle and so on. Some of the striping is because some of the threads are variegated too. those are actually blocks for a larger afghan those measure about a foot across the yoyo shapes in those afghan are the size of a dime. But that is because I am using crochet thread and a steel size 6 hook you could use yarn and then those would be probably baby car seat size afghans.
hope that helps some
Fantastic! My first response on seeing your pictures was HOLY COW! And then I peeked at your (awesomely detailed) tutorial, and realized how clever it is.
How hard is it to figure out the layout (to make striped "rounds" like yours)? And, how do you know when to change yarn colors? Or, are your afghans above just giant "blocks" where you used the same technique around and around?