Start with the right workspace
Open your preferred coding assistant or 3D tool. Use the model shown on the example as a starting point, and check any linked project for setup instructions.
GPT-6 AstraReference brief
Kinetic Sand Table Simulation
A reusable prompt supplied by the posting author as the exact open prompt received by GPT-6 Astra and Fable 5.1. It requests a self-running kinetic sand-table simulation in a single HTML file: a ball draws non-repeating geometric patterns in sand, then smooths the surface before beginning another pattern.
About this example
A starting brief based on the creator's public project, not a verbatim original prompt. Your result will vary.
Creator notes
Create a self-contained HTML kinetic sand-table simulation that starts automatically. Show a ball moving through sand, leaving visible grooves while completing geometric patterns. Automatically smooth the sand between patterns and generate many different patterns without repeating. Make all visual, environmental, camera, and presentation decisions yourself; do not use external assets.
kinetic sand tablesand simulationgeometric patternsprocedural animationinteractive HTML3D simulationself-contained HTMLGPT-6 Astra
The prompt
Build a kinetic sand table simulation. A ball must move through a bed of sand, leaving a visible trail, drawing complete geometric patterns, then smoothing the sand and starting a new and different pattern automatically. It must cycle through many different patterns without repeating. Everything about the look and the patterns is your choice.
Everything about the design is your decision: style, colors, mood, environment, camera, level of detail, and any extra touches. Do not ask me any questions, make every choice yourself and build the most impressive version you can in a single attempt.
Technical requirements: one single self-contained HTML file, no external models, images, sounds, or asset URLs of any kind (a JavaScript library from a CDN is fine). It must start running on its own the moment it loads, with no clicks needed, and run smoothly with no console errors.
How to use this prompt
Choose one thing to change
Swap the subject, art style or setting. Keep the camera and interaction clear. Build a small version first, then refine one detail at a time.
Give the scene its own assets
For a custom character or prop, create a 3D model from a short object description or reference image, then bring it into your project.
Previews belong to their respective creators. Check the original source and project license before reusing code or assets.
