no key actions needed, it's a simulation, move your cursor to the left you'll have variables you can change. i added creepers for joking, ¬_¬ a bit strange
Data for does who don't know: Boids is an artificial life program, developed by Craig Reynolds in 1986, which simulates the flocking behaviour of birds, and related group motion. His paper on this topic was published in 1987 in the proceedings of the ACM SIGGRAPH conference. Credits for the tutorial of Griefpatch