Many crocheters write in about doing afghans like this. It’s a fabulous granny afghan that is so abstract. It will mess with your eyes. It’s an art form unto itself.
This free pattern by Lion Brand Yarns is stunning. This type of afghan is on my bucket list. I just love how it doesn’t look uniform. The free pattern gives you the keys you need to work out an afghan like this. Some of the complaints I have heard about this afghans is sometimes hitting a road block on squares not working out properly. Look carefully though, not all of the blocks are square!