Create an easy fall coloring line-art illustration for young children featuring scene: Rolling Hills of Autumn Trees. Treat the scene description as a literal visual requirement. Every specific character, object, setting, or activity named in Rolling Hills of Autumn Trees must be clearly visible and easy to recognize. These scene-defining elements are the main focal points of the illustration and should be shown prominently. The star of every scene is the fall landscape itself, composed of a few large, simple, friendly shapes: gently rolling hills, big rounded trees with large simple leaves, wide open skies, and one or two big falling leaves drifting through the air. Draw every landscape element bold and oversized with thick simple outlines so each hill, tree, cloud, and building is its own big open coloring area. One or two tiny woodland friends, such as a little fox, squirrel, bird, or bunny, may appear small in the scene for charm, kept clearly secondary to the landscape, or may be omitted entirely. For the scene "Rolling Hills of Autumn Trees," show three or four overlapping rounded hills with a few big simple trees of different sizes and a wide sky with soft clouds. For the scene "Country Lane with a Wooden Fence," show a wide dirt lane curving from the bottom edge toward the hills with a simple three-rail wooden fence following the curve and a few big leaves drifting across. For the scene "Covered Bridge Over a Stream," show one large simple covered bridge with a big arched opening crossing a gently curving stream, with a tree on each bank. For the scene "Red Barn and Hay Bales at Sunset," show one big simple barn with plain walls and a large door, two or three round hay bales nearby, and a big half-sun with wide rays setting behind a hill. For the scene "Quiet Lake with a Rowboat," show a large calm lake taking up the lower canvas with one small empty rowboat floating near the shore and trees around the far bank. For the scene "Forest Path with Falling Leaves," show a wide path winding between big tree trunks with large simple leaves falling all around and a few resting on the path. For the scene "Windmill on a Breezy Hill," show one tall simple windmill with four wide blades on a rounded hill, with wind swishes and a few leaves blowing past. For the scene "Harvest Moon Over the Valley," show one very large round moon low over a wide valley of rounded hills and small simple trees, with a few stars in the sky. Keep the scene simple, spacious, and easy for young children to color, using only a few large, clearly separated elements, broad open coloring areas, generous white space, and minimal detail. Present the line artwork itself directly as the image: a flat, straight-on digital illustration filling the canvas, with the canvas edges themselves forming the outer limits of the artwork. Use only black outlines on a pure white background, and keep every enclosed shape completely unfilled with a bright white interior. Every visible element, including lights, windows, leaves, acorns, trees, shrubs, bushes, barns, bridges, and hair, is rendered as crisp black outline line art with bright white interiors, so the entire illustration reads as a pure black-and-white line-art image. Create a true edge-to-edge composition: a few large scene elements may naturally continue beyond and be cropped by the four canvas edges, while the main characters and main activity remain clearly visible within the canvas, leaving the canvas edges visually open rather than enclosed. Keep all potentially writable surfaces plain and unmarked; communicate everything entirely through characters, objects, poses, and actions. The finished artwork contains only pictorial black linework and white coloring space.