STARTING SPACE
One cream paper glider rests on a broad desk beside a fully open window. Beyond the window is a clear sunset sky. One adult hand is visible at the glider's tail. Preserve the same folded wings, pointed nose, and cream paper throughout.

ONE SHOT, TWO WORLDS
0–4s: Begin at desktop height. The hand launches the glider gently toward the open window. Track behind and slightly above it, showing the empty window opening and a clear flight path.
4–9s: The glider passes between the window jambs without touching them; the camera follows through the same opening. As the desk leaves view, the distant clouds gradually reveal enormous floating stone arches. The transformation affects only the distant world, not the glider or window.
9–13s: Follow the glider descending gently toward one distant arch. The closest arch grows through camera approach, with distant arches moving more slowly. Keep sunlight from the same side.
13–15s: Let the glider bank slightly right while the camera eases to a slower forward drift. End before reaching the arch, preserving an open destination for the next shot.

SOUND AND GEOMETRY
Paper release and a close air swish become open-air wind after crossing the window. Add one sustained, wordless musical tone as the arches become visible. No cut, portal flash, text, paper-to-metal transformation, powered flight, or glider duplication. Keep the window opening wider than the wingspan.