coloring book cover, simple clean illustration with vibrant colors and no shades: A smiling white baby 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. Night window. Simple shapes, no lines and no details, bold outlines. 1/3 of the the picture should be uncolored with the outlines only