Generate a time-lapse style clip by describing environmental change, not a speed setting

Write a Veo 3.1 prompt for an 8-second time-lapse-style clip. Veo has no literal fast-forward or frames-per-second control exposed in the prompt itself, so a time-lapse effect has to be produced by describing an environmental state change large enough to read as compressed time within the fixed eight-second duration, not by simply labeling the clip "time-lapse" and expecting the model to infer an appropriate speed on its own.

SCENE AND SUBJECT
a city skyline seen from a rooftop, facing west, held from a static wide shot from a fixed rooftop vantage point for the entire clip — a time-lapse in this format is a static or very slow-drift shot of a place, not a moving subject, since the compressed-time effect comes from the environment changing around a fixed vantage point.

ENVIRONMENTAL CHANGE TO SHOW
the sky shifting from bright blue through orange and deep purple as the sun sets behind the buildings, city lights beginning to switch on. Describe the actual before-and-after state the environment moves through — the sun's position and shadow length shifting noticeably, clouds visibly traveling and reshaping, the sky's color shifting from one hue toward another — as concretely as possible, since this described change, not a labeled "time-lapse" instruction, is what the model actually has to render across the duration.

PACE OF CHANGE
roughly two hours of a full sunset compressed into the eight seconds. State roughly how much real-world time this eight-second clip is meant to compress — a few hours of a sunset, or a full day-to-night cycle — since the amount of described change should scale with how much compression is being asked for; a clip claiming to compress an entire day needs correspondingly dramatic named shifts in light and sky color, not the same subtle change that would suit a compressed twenty minutes.

WHAT STAYS FIXED
the building silhouettes and skyline shape stay exactly fixed against the changing sky. Name what should remain visually unchanged throughout — a building's position, a mountain's silhouette — since an unstated static element sometimes drifts or subtly changes anyway if nothing anchors it as fixed against everything else that is deliberately changing.

STYLE AND MOOD
clean, high-contrast, saturated sunset color palette.

AUDIO
near-silent, a very faint distant city hum, no music — keep this understated or largely absent, since a genuinely time-compressed environment has no real continuous soundtrack to match; most time-lapse footage is silent or carries a separately added score, and native audio generated to match a compressed timescale tends to read as an odd, smeared blend rather than anything coherent.

WHAT TO AVOID
Do not include a moving person, vehicle, or animal in a time-lapse shot unless the intent is specifically a "hyperlapse" style with fast, blurred motion for living subjects — a person rendered at the same compressed rate as the sky and shadows around them produces an uncanny, physically inconsistent result, since a body cannot move at a genuinely time-lapsed rate the way light and weather can.

OUTPUT
The finished prompt, followed by one line stating how much real-world time this specific eight-second clip is meant to represent, so the named environmental change can be checked against that scale.