@carrideen I’m with you that Duolingo can be helpful as part of a balanced diet! I’m on it now because for a while I was doing Wanikani only and hit a different sort of wall trying to memorize thousands of independent contextless facts.
Basic models of flocking behavior are controlled by three simple rules: 1) separation: avoid crowding neighbours (short range repulsion); 2) alignment: steer towards average heading of neighbors; 3) cohesion: steer towards average position of neighbors (long range attraction). With these three simple rules, the flock moves in an extremely realistic way.