Generate an image of a peaceful valley surrounded by towering mountains at dawn. The sunlight is just starting to peek over the mountaintops, casting long shadows across the valley floor. The grasses and wildflowers should be vibrantly colored, with a crystal-clear river winding its way through the scene. Use warm colors like oranges, yellows, and pinks to represent the rising sun, while maintaining cooler blues and greens to keep the overall feel tranquil and idyllic. This prompt offers an opportunity to capture the beauty and serenity often found in nature.