int div = 75;
int num = 100;
float gX = 400;
float gY = 210;
Blob[] blobs;

void setup() {
  size(800, 800);
  smooth();
  framerate(30);
  reset();
}

void draw() {
  background(60,63,188);
  
  if ( mousePressed == true )
  {
    gX = mouseX;
    gY = mouseY;
  }

  for( int i=0; i<num; i++) 
  {
    blobs[i].gravitate(gX, gY);
    blobs[i].repulse();
    blobs[i].move();
    blobs[i].display();
  }
}

void reset()
{
  blobs = new Blob[num]; // blob[0]..blob[1]..blob[2]......blob[99]
  
  for( int i=0; i<div; i++)
  {
    blobs[i] = new Blob(random(0, width), random(0, height), "A");
  }
  for( int i=div; i<num; i++)
  {
    blobs[i] = new Blob(random(0, width), random(0, height), "B");
  }
}