This is just a little interactive program where the lightest particle is attracted your mouse, the next lightest attracted to that particle, and so on for 9 particles. Basically, 1 tiny movement of your mouse will cause the first particle to move a bit, the second one to move more, the third even more until the 9th one is off the screen.
Release date
2007-07-12
Source
https://www.deviantart.com/austron/art/Particle-Gravity-Simulator-59658887

