ORGANISMS
This shows the trails of some dwindling specks of colour as they radiate from several energetic organisms. Each organism belongs to one of two contrasted species: those that give off green specks and those that give off yellowish ones. Each organism accelerates with a constant magnitude of acceleration towards the closest organism of the opposite species. Meanwhile, each organism expels a stream of specks of the appropriate colour in the direction opposite to its acceleration. All the specks of colour move at the same speed and fade as they move.