The green particles are preys and the reds are predators. A prey gets eaten when a predator get too close to it.
Each particle has a set of parameters (such as mass, acceleration, top speed, etc) which affect how they move. These particles are passed onto their offspring
Both preys and predator reproduce in regular intervals within their lifespan. A prey's natural lifespan can be cut short if it gets eaten. A predator's natural lifespan can be cut short if it fails to catch any prey for a long period of time.
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