ArrayList boids;
int numBoids = 50; 
  
void setup() {
  
  size(400, 400);
  stroke(0);
  smooth();
  
  boids = new ArrayList();
  
  for (int i = 0; i < numBoids; i++) {
  
    PVector initialPosition = new PVector((width/2) + random(-400, 400), (height/2) + random(-400, 400));
    PVector initialVelocity = new PVector(0, 0);
  
    boids.add(new Boid(initialPosition, initialVelocity));

  }
}

void draw() {
  
  background(0);
  
  for (int i = 0; i < boids.size(); i++) {
    
    Boid boid = (Boid) boids.get(i);
    
    boid.drawFlock();
    boid.behaviours(boids);
  
  }
}