Urban Billboard Ribbon Dance Animation

[CONDITION DEFINITION]
Reference Image: @image1
Aspect Ratio: 1:1
Length: 15 seconds
Style: Conforms to @image1
Sound: Sound effects only. No BGM, songs, dialogue, or subtitles.

Use @image1 as the sole visual anchor, maintaining the character, costume, giant billboard, workbench, auxiliary ads, evening city structure, and style. Set in a completed urban advertising world, only the paint in the billboard background comes to life and dances at high speed. The person in the giant billboard remains a flat, static advertisement, and the person in real space also stands naturally at the workbench, simply holding a spray can down. The main subjects are 2-3 wide liquid paint ribbons with thickness and area, along with several short brushstrokes. At their peak, they become bold color planes occupying 1/4 to 1/2 of the screen, continuously transforming into liquid sheets, thick brushstrokes, fan shapes, giant arcs, and rotating vortices. Do not make them like thin threads, strings, cords, or wires.

[SHOT / FLOW]
0.0–1.3s | Immediate Start: Extreme close-up of the giant billboard background. Thick orange, navy, and auxiliary color paints rise within 0.3 seconds and explode across the billboard surface in multiple directions. The camera slides at high speed just above the paint surface without showing quiet pulsations for long.
1.3–4.0s | Giant Paint Release: 2–3 wide liquid paints and large color sheets pop out three-dimensionally from the billboard. The camera dives under wide paint, breaks through between two color planes, overtakes from the side, and plunges immediately after a giant brushstroke crosses the foreground. The paint boldly crosses the foreground and background, creating a strong sense of depth and speed.
4.0–7.4s | Low-Altitude City Rush: The camera plunges from between buildings to above the main street, racing just above streetlights and cars. Wide paint cuts sharply left and right, grazing auxiliary ads and buildings. As the paint passes, ads are 'reignited' with intense color and gloss. City windows and lights turn on in a chain reaction. Do not return to the main building in this section.
7.4–10.4s | Vertical Surge and Vortex Breakthrough: Giant paint sheets race up skyscraper walls, defying gravity. The camera rises vertically at high speed right next to the wall and banks sharply 90 degrees around a building corner. Wide paints form a massive three-dimensional vortex between buildings. The camera dives head-on into the center of the vortex and breaks through completely. This sequence is mandatory.
10.4–12.8s | Grand Merger and City Reigniting: Multiple paints gather at high speed in front of the main building, forming a giant fan shape and converging onto the main ad. The final brushstroke settles into the finished @image1 design. The person at the workbench is shown briefly as their hair and clothing sway from the wind pressure.
12.8–15.0s | High-Speed Ascent, Full View, Afterglow: The camera ascends on the final paint's trajectory and pulls back at high speed to show the giant billboard, the person, and the entire lit-up evening city. Paint settles into the background, leaving a 1-second panoramic afterglow.

[CAMERA / EDITING]
Maintain a three-dimensional sense of movement. Mandatory sequence: Extreme close-up sliding -> Breaking through color planes -> Low-altitude plunge -> High-speed boulevard rush -> Vertical wall surge -> 90-degree bank turn -> Vortex center breakthrough -> High-speed gathering -> Ascending to full view. Do not track at the same distance/angle for more than 1.5 seconds. Continuously vary speed, direction, and perspective.

[SOUND]
Sound effects only: low fluid sounds, heavy whooshes, wind cutting, vertical surge effects, vortex rotation, impact sounds, and subtle electronic sounds of lights lighting up.

[NEGATIVE]
No thin threads/wires. No long single-ribbon tracking. No small ribbons only. No weak paint volume. No static start. No slow circling of the workbench. No return to main billboard before 10.4s. Do not omit the vertical surge. No small rings for the vortex; must break through the center. No flat horizontal movement. Do not move or 3D-ify the person in the billboard. No dancing/gesturing by the real person. No mud/dirt/chaotic splatters. Do not obscure faces. No logos/watermarks. No construction machinery.

[CORE INTENT]
A 15-second video featuring wide, heavy paint ribbons racing through a 3D city at high speed, with the vertical wall surge and vortex breakthrough as climaxes, reactivating the city lights and ending with a panoramic view.