class Firefly {
  float x, y, w, xspeed, yspeed;
  //color c;

  Firefly(float x_, float y_, float w_){
    x = x_;
    y = y_;
    w = w_;
    xspeed = pot1;
    yspeed = pot2;
  }

  void move() {
    x = pot1;
    if (x > width+100 || x < -100) {
      pot1 = pot1*-0.95;
      x = width;
    }
    y = pot2;
    if (y > height+100 || y < -100) {
      pot2 = pot2*-0.95;
      y = height;
    }
  }

  void display() {
    //fill(0);
    float r = pot1;
    float g = pot2;
    fill(r,g,0);
    if(r > 255) {
      r=255;
    }
    if(g > 255) {
      g=255;
    }
    noStroke();
    ellipse(x, y, w, w);
  }
}