"Line art of a horse standing in a grassy field, looking forward with a calm and graceful stance. The horse has a flowing mane and tail, facing the viewer. Surrounding the horse is a dense forest with tall, detailed trees, including both evergreens and broadleaf varieties. In the background, rolling hills and a clear sky are visible. The entire scene should be designed for a coloring page, with intricate patterns in the grass, trees, and horse for added detail.