This recent book from Annie’s Crochet provides further inspiration for the innovative waterfall crochet colour technique
Discover a method that lets you get the look of multiple midrow colour changes without all the hassle. This technique uses chain spaces to form a lattice to work over. Colours are worked the entire row and colour changes are only done at the ends of rows. You will find 20 different granny square patterns, all the same size, plus instructions to join them together, as well as a simple but unique border. For most squares the yarn is carried up the side and worked over when stitching the border.