Generate a matching set of short chapter-transition bumpers for a longer edited video

Write a Veo 3.1 prompt for a short transition bumper — roughly 3-5 seconds — meant to appear between chapters of a longer edited video. Because several of these will be generated, one for each chapter break, most of the clip has to stay identical across every version while exactly one small element changes to distinguish which transition this is.

SHARED MOTIF — KEEP IDENTICAL ACROSS EVERY CHAPTER TRANSITION
a single thin line of light tracing itself across a dark background, forming a simple geometric shape. Describe this core visual exactly the same way in every chapter-transition prompt generated for this video; it's the element that makes every transition recognizably part of the same video, and any wording drift between transitions renders as an actual visual inconsistency, not a harmless rephrasing.

THE ONE VARIABLE ELEMENT
the line's color shifting to a distinct accent color for this chapter, a soft amber, the single small detail that changes to mark this specific chapter transition apart from the others — a number, a distinct color accent, a specific small object — kept visually simple enough that it reads clearly within a 3-5 second clip.

CAMERA
a fully static frame, centered, no movement, identical across every transition generated for this video, for the same consistency reason as the shared visual motif.

COLOR AND LIGHTING
a near-black background, otherwise unlit except for the traced line itself, held constant across every version except wherever the one variable element specifically requires a different accent color.

AUDIO
a short rising tone as the line traces, pitch shifting slightly per chapter's accent color, the same core sound identity across every chapter break, with at most a minor pitch or texture variation tied to the one variable element if needed — a fully different sound per chapter would undercut the sense that these are all the same recurring transition device.

WHAT TO AVOID
Do not make the shared motif elaborate enough that regenerating it precisely for every chapter becomes unreliable — a simple, easily-repeatable visual is more valuable here than an impressive one that renders slightly differently each time it's requested. Do not add chapter titles or on-screen text as part of the generated video; overlay chapter names in post since Veo does not reliably render small legible text, and this asset needs to work across many chapters without regenerating for text changes alone.

OUTPUT
The finished prompt for this one chapter transition, followed by one line naming which chapter this represents and confirming the shared motif wording matches what was used in the other chapter transitions for this video.