Sora提示词：Create a realistic hand-drawing time-lapse video that shows

Create a realistic hand-drawing time-lapse video that shows the entire process from a blank sheet of paper to the final artwork.
Aspect ratio: vertical.
Duration: 15 seconds, with smooth, continuous time-lapse pacing.

Camera: top-down view over a clean indoor drawing desk.
Environment: an indoor studio setting with soft, even overhead lighting. Visible drawing tools such as pencils and markers should be naturally arranged around the desk.

Begin with a completely blank white sketch paper.
Show a natural traditional drawing workflow: light pencil guidelines → refined outlines → shading → texture → final color and detail rendering.
The artist’s hands using pencils and markers must remain visible throughout the entire process.

After the artwork is fully completed, the artist handwrites a signature in the bottom-right corner that reads “Kong lingchao 2025.12”.
This signature-writing process must also be recorded in the time-lapse.
The final frame must perfectly match the uploaded reference image.