"Do not change any part of the image except the sky. Keep the tree, mountains, grass, and all other elements exactly as they are in the original. The sky must be entirely black, representing night, with many bright, visible stars. The stars should be scattered throughout the sky. Ensure the sky is black, not blue, and make sure no other elements are added to the image. No changes should be made to the tree, grass, mountains, or lighting. Only change the sky to black with stars."