Sure thing! Here is the prompt modified to be set in the fall:

"Create an image of a vibrant, imaginary landscape with rolling hills, towering mountains, and winding rivers surrounded by forests draped in beautiful autumnal colors. The landscape should be full of vibrant colors, from the deep red and vibrant yellow of the tree leaves to the shimmering rivers and the bright blue sky. The mountains should be capped with snow. Imagine a peaceful, idyllic scene, where nature reigns supreme."
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