This is an easy pattern. Circles are easy to crochet in general in simple dc, sc, etc.: just keep increasing groupings one more stitch farther apart for each and every new row and the circle should lay flat even if you keep going like that for forever.
"Carolyn from The Pink Mambo says: "This is one of my favorite stitch patterns. It has great drape, and I’ve made everything from dishcloths to garments with this pattern. It is the basis for my Single Crochet Entrelac techniq.