ball[] swarm;
int swarmSize;

void setup(){
  size(500,500);
  swarmSize = 10;  // Define the size of the swarm
  swarm = new ball[swarmSize];
  for(int i = 0; i < swarmSize; i = i + 1){
     swarm[i] = new ball();   // Create the swarm
 }
}

void draw(){  
  fill(200,200,200,100); // slight transparency
  rect(0,0,width,height);
  for(int i = 0; i < swarmSize; i = i + 1){
      swarm[i].display();  // Display each ball
      swarm[i].update();   // Move each ball
  }
}