# MiniMax H3 two-gear prompt: opposite rotation with fixed centers

Rotate two visible schematic gears in opposite directions while their centers stay fixed. The useful task is a relationship between moving parts, not a single object spinning in place.

Original synthetic practice still, not a generated result. No model run has been performed.

Files: first-frame.png (1024×1024 actual first-frame input), first-frame.svg (editable geometric design source; do not upload as if it were PNG), prompt.en.txt / prompt.zh.txt, acceptance.blank.csv (all observations empty), task-definition.json and RIGHTS-REVIEW.txt.

## Generator

Use MiniMax H3 base image-to-video. Turn on Add end frame to expose First Frame, upload first-frame.png only, and leave Last Frame empty. Fast requires a pair and is not covered. Choose only options offered by the current interface; opening it does not submit.

## Starting state

The first-frame drawing has two equal-size toothed wheels with one marked tooth on each and a visible central axle. Their teeth alternate in a narrow meeting region. This is an original visual schematic, not a CAD model or a standard gear profile.

Keep both axle centers fixed. Track the two colored teeth separately and watch where the wheels meet; a convincing spinning texture is not enough if the teeth merge or the centers drift.

## Steps

1. Identify the marked tooth on each wheel and each axle center. Keep the first attempt slow enough that individual teeth remain readable.
2. State both directions explicitly; asking for gears to spin can leave their relationship unspecified. Do not add a motor, belt or machine transformation.
3. Inspect the approach to the meeting region, the midpoint and the joint stop. Reject a visually energetic result if it creates a single fused wheel or moves the axles.

## Acceptance

- Both axle centers remain at their original positions and each wheel keeps its size.
- The left marked tooth moves clockwise and the right one counterclockwise.
- The meeting region keeps two distinguishable sets of teeth rather than a fused surface.
- Both wheels stop and hold without adding parts.

## Limits

The schematic and prompt do not validate involute profiles, clearance, torque transmission, tooth counts or an exact angular ratio.

Read prompt.en.txt before submitting. No pass results or output video are included.