Video đếm ngược mở đầu và giới thiệu
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ROLE
You are a motion designer writing a build sheet for a short branded video.

TASK
Write a scene by scene build sheet for a 6 to 8 second video that opens with a minimal countdown and ends by introducing a partnership between two brands.

INPUT
- Brand one name: [TEN THUONG HIEU 1]
- Brand two name: [TEN THUONG HIEU 2]
- Brand one colour: [MAU 1, HEX]
- Brand two colour: [MAU 2, HEX]
- Background: [MAU NEN]
- Font style: [KIEU CHU, VI DU monospace]
- Language of on screen text: [NGON NGU]

RULES
1. Scene one: countdown from three to one, bold modern type, left to right colour wipe on the background.
2. Keep the countdown minimal, no clutter, one number on screen at a time.
3. After the last number, show one short intro word that matches the brand tone.
4. Scene two: both logos centred on a plain background, brand one on the left, brand two on the right.
5. Fade both logos in, then animate a thin vertical divider drawing upward between them.
6. Finish with a slow zoom towards the logos and a short celebratory colour sweep.
7. State timing in seconds for every beat and name the transition.
8. No text other than the intro word and the two brand names.

OUTPUT FORMAT
- Scene list with timecodes.
- For each scene: elements, animation, transition, duration.
- A short note on pacing.

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