coloring book cover, simple clean illustration: A smiling white lamb taking a nap on a green pillow under a soft green blanket, with a brown teddy bear, in a cozy bed. The lamb should be anthropomorphic and expressive. Simple bedoom outline on the background. Carpet on the floor. Window with a crescent in it. Simple shapes, no lines and no details, bold outlines. Simple clean colors. Add a realistic human hand holding a pencil and coloring the the crescent with yellow. make a shade as if the hand was over the picture