Prompts / Google Flow

The Night Train

On a sleeper train racing across a moonlit plain, gloved hands open a case of diamonds, the lights fail, and only a queen of spades remains, noir animated style.

A Google Flow prompt, shown with the unedited 10-second clip it made (16:9).

The prompt

Stylized 2D noir-thriller animation: limited palette, flat shapes, hard shadows, film grain. 0-3 s: a sleeper train races across a moonlit plain. 3-7 s: in a velvet compartment, gloved hands open a briefcase full of glittering diamonds; the lights flicker and go out. 7-10 s: the lights come back on: the case is empty except for a single playing card, the queen of spades. Close-ups, hard cuts. Sound: rattling wheels, a click, darkness hum, a sharp brass sting. Full-frame 16:9 with no letterbox bars. No subtitles, no on-screen text, no watermark, no logos. 16:9, 10 seconds.

What each part of the prompt does

Look

"Stylized 2D noir-thriller animation" leads, followed by "limited palette, flat shapes, hard shadows, film grain". Hard shadows suit a velvet compartment that goes dark. A limited palette lets the glitter of the diamonds and the single card stand apart from everything else.

Timed beats

The first beat is only the train racing. The second holds the diamond reveal and the blackout, the one beat with two actions. The third is the payoff: lights back on, case empty, a single queen of spades. Each beat ends on a new question or answer.

Camera

"Close-ups, hard cuts." This prompt asks for cuts rather than one continuous move. Close-ups keep attention on the gloved hands and the case, and hard cuts suit the sudden blackout and the return of the light.

Sound

"Sound: rattling wheels, a click, darkness hum, a sharp brass sting." Wheels carry the opening beat. The click is the briefcase opening. The hum fills the blackout, and the brass sting lands on the queen of spades.

Rules

Standard guardrails close it: full-frame 16:9 with no letterbox bars, and no subtitles, on-screen text, watermark or logos. Noir often leans on title cards, so ruling out text helps. Then 16:9 and 10 seconds.

Second by second

1. 0–3 s: a sleeper train races across a moonlit plain.
2. 3–7 s: in a velvet compartment, gloved hands open a briefcase full of glittering diamonds; the lights flicker and go out.
3. 7–10 s: the lights come back on: the case is empty except for a single playing card, the queen of spades.

Make it yours

• Ruby necklace: Replace "a briefcase full of glittering diamonds" with "a velvet box holding a ruby necklace" and "the case is empty" with "the box is empty".
• Rainstorm run: Change "races across a moonlit plain" to "races through a rainstorm at night" for wet windows and harder contrast in the opening beat.
• Vertical for Reels: Change both 16:9 mentions to 9:16. Close-ups already suit a tall frame; for the opening, change "a sleeper train races" to "a sleeper train seen head-on races" so the train fits the narrow width.

Where this prompt is from

All the Google Flow film prompts are free on AI Video With Code.

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