class Violet {
  float x, y, w, speed, a;

  Violet (float x_, float y_, float w_, float speed_, float a_) {
    x = x_;
    y = y_;
    w = w_;
    speed = speed_;   
    a = a_;
  }

  void displayv () {
    noStroke ();
    fill (255,0,243, a);
    ellipse (x,y,w,w);
  }
  void movev () {
    x      +=      r * cos(theta); 

    y      +=      r * sin(theta); 

    theta  -=  0.001;
    
    if (random(1.0) < 0.04) {
      r += .001;
    }

    x  = x + random( - 10,10);
    y  = y + random( - 10,10);

    x = constrain (x,0,width);
    y = constrain (y,0,height);


    a  = a ++;
    if (a > 100) {
      a-=40; 
    }
    else if (a < 20) {
      a+=40;
    }
  }

  void bouncev () {
    if ( y < 1 ||  y> (height-1) || x < 1 || x > (width-1)) {
      speed       =     speed * - 0.95;
    }
    if (buttonv) {
      if (random(1.0) < 0.02) {

        Violet vs = new Violet(random(300,320), random(410,420), random(3,6), random(6), random (150,70));
        violets = (Violet []) append (violets, vs);
      }
    }
  }
}