Great idea for a modular knit blanket. One simple shape makes a great quilt. Sidewalk Quilt by Pippa, an original design. Pattern available on her website and a similar version for sale in her Etsy shop.
Mitered squares blanket, free crochet pattern by Bernat. Squares don't have to be done separately & then joined with this pattern. I like the effect of using variegated yarn with this. I would like to do one in beachy blues, sea greens and sandy browns