Generate a 15-second photorealistic surreal city transformation in one continuous aerial shot. 0 to 5 seconds: camera flies between ordinary skyscrapers in bright afternoon light. 5 to 9 seconds: buildings begin folding cleanly along invisible seams like enormous pieces of origami. 9 to 12 seconds: entire streets bend upward until cars continue driving vertically along them. 12 to 15 seconds: pull back to reveal the whole city folding itself into an enormous paper crane floating above the clouds. Sound: traffic slowly blending into paper folds, structural creaks and rushing wind.