This is basically my version of a ripple blanket and I am sure there are many similar ones on the internet. Ripples are created by adding and removing stitches. For my blanket I chose to create the decreases by skipping 2 stitches thus creating a decorative hole, and the increases by putting 3 stitches in a single stitch. I am using a double crochet throughout. My blanket is very large at 334 sts (a multiple of 11+4). I want to make sure that we can all fit under it!
I still have a long way to go. But the trick with these large projects is just to sit back, relax, and crochet without rushing, just enjoying the process, and from time to time pausing to appreciate the colors, and the dimensional qualitites of the blanket.