Hi! I'm looking to make a landscape image similar to the one below by first making the grid and then filling it in with the paint bucket. Note I DO NOT WANT PERSPECTIVE, so the perspective grid tool isn't helpful. I've tried messing around with the rectangular grid and mesh tools but I'm very new to Illustrator and can't get what I want. Any help is appreciated, thanks!
I'm using Adobe Illustrator CS6 by the way.