int num=1600; // number of stars
Star[] stars = new Star[num];

void setup()
{
  noStroke();
  size(360, 360);
  ellipseMode(CENTER_RADIUS);
    for (int i = 0; i < num; i++){
      stars[i] = new Star(random(width), random(height));
    }
}

void loop()
{
   background(0);
   for(int i = 0; i < num; i ++){
    stars[i].update();
    stars[i].paint();
  }
}

class Star {
  float x, y;
  float starcolorr = random(0, 255);
  float starcolorg = random(0, 255);


  Star(float _xpos, float _ypos) {

    x = _xpos;
    y = _ypos;
  }

  void update() {
  
  float distance;
  float dx = mouseX - x;
  float dy = mouseY - y;
  distance = (float)Math.sqrt(dx*dx + dy*dy);
 // if (mousePressed){
  if(distance<50) {
  if(distance<1){distance = 1;}
  x = x - (dx/distance)*2 + random(-2, 2);
  y = y - (dy/distance) + random (-2, 2);
  }
//  }
  
  x = x + random(-2, 2);
  y = y + random(-2, 2);
  
  
  if (x > width) {x = 0;}
  if (x < 0) {x = width;}
  if (y > height) {y = 0;}
  if (y < 0) {y = height;}

  }


  void paint() {
     stroke(starcolorr, starcolorg, 0);
     point(x, y);
  }
}