So here's the plan: I'm knitting my parents an afghan for Christmas, one sized to fit my 6'5" father, who's always complaining about blankets that are too short. (Is 5'x7' unreasonably huge for an afghan? ) I'm going to build it in nice little 12"x12" squares in blue, green, and tan, in a lake-themed way. I wanted to do stitch patterns in each color that were reminiscent of water, grass, and sand. The first two aren't too hard to find, but I've been through what feels like several thousand dishcloth and stitch pattern and seen nothing that resembles sand dunes. I was hoping to find something that was mostly stockinette, with just a little something to define hilly-type shapes (I'll put a border on the squares to help with the curling). Does anyone know of a pattern like that, or have suggestions on where to start making up my own? Any help would be much appreciated.