"Pick a ball"
Ask viewers to pick a color in the first second and comment whether it survived.
HypnoSim / Gravity Well
Gravity well simulation videos for Shorts
In the Gravity Well template, balls orbit one or more centers of gravity inside a safe zone. The first ball pops out after three seconds, then one more every two seconds, until only one ball is left in orbit.
Create this video free →
A 15-second run with a random seed, simulated in your browser.
It asks one simple question, "Which ball stays in orbit?", and answers it on screen. Viewers pick a ball in the first seconds and watch to see if it survives.
How it works
- A central gravity well pulls every orbiter towards it. Add up to 4 satellite wells for more complex paths.
- The dashed safe zone follows the swarm. The ball farthest from the center, the one touching the edge, is eliminated on a steady beat.
- The last ball gets a "LAST ONE IN ORBIT" banner and the video ends a moment later, so the ending always has a winner. With 12 balls that is about 25 seconds.
- Trail length (4–24) controls how long the tails behind each orbiter are. Each seed gives a different winner.
What you can customize
- Ends when one ball stays in orbit
- Gravity & bounciness
- Satellite wells
- Trail length
- 9:16 · 16:9 · 1:1 MP4 with sound
Video ideas
Last one standing
Use a title like "Which ball stays in orbit?" so the question is answered on screen.
Bigger crowds
Raise the ball count for longer elimination runs, or add satellite wells for more chaotic orbits.
Gravity Well FAQ
Is this an accurate orbital physics simulator?
It is built for satisfying visuals, not scientific accuracy. The gravity pull is physics-based, but parameters are tuned to look good on video.
How long is the video?
It runs until one ball is left: about 3 seconds plus 2 seconds per ball, so 12 balls give roughly 25 seconds. The max length setting is only a safety cap; with many balls the pace speeds up to fit. Export 9:16, 16:9 or 1:1 at 60 fps.
Does it add sound?
Yes. Collisions trigger synthesized sound that is rendered into the MP4, in sync with the video.