This is the multiple-body problem. Spawn in a number of bodies randomly around the space. Watch the chaos elapse as gravity sends them spiralling out to nowhere. https://turbowarp.org/750238523?hqpen&offscreen&clones=Infinity WASD+ZX - Move space QE+Arrows - Rotate FG - Zoom
At the start, if you want to randomly spawn bodies, just for fun, enter 'N'. If you want to place bodies specifically in space, enter 'Y'. You will be prompted to enter the number of bodies you want, and please keep that number below 100. Then, if you entered 'Y' at the start, you will be asked to fill out the parameters of each particle, one by one, particle by particle. I recommend starting out with the random bodies, then try out the specific ones, which is a lot more interesting.