constructor(R, r, d) {

    this.R = int(random(25,350)); 

    this.r = int(random(25,350));

    this.d = int(random(5,150));

    this.angle = random(0, TWO_PI);

    this.x = 0;

    this.y = 0;

    this.calculate();

    this.prevX = this.y;

    this.prevY = this.x;

  }

  calculate() {

    this.x = (this.r+this.r)*(tan(this.angle))-this.d*0.41*tan((this.R-this.r)/this.r*this.angle*2);

    this.y = (this.R-this.r)*tan(sin(this.angle*1.8))+this.d*0.57*cos((this.R+this.r)/this.r*this.angle);

  }

  draw() {

    this.calculate();

    if (dist(this.x, this.y, this.prevX, this.prevY) > width/4) {

      this.prevX = this.x;

      this.prevY = this.y;

    }

    // stroke(0,50)

    // line(this.x, this.y, this.prevX, this.prevY);

    point(this.x, this.y);

    this.prevX = this.x;

    this.prevY = this.y;

    this.angle += 0.02;

  }

}