constructor(posx, total) {

    this.particles = [];

    this.springs = [];

    this.k = 0.005;

    this.total = total;

    this.spacing = this.total / 2;

    this.wind = createVector();

​

    for (let i = 0; i < total; i++) {

      this.particles[i] = new Particle(posx, height - i * this.spacing - 4);

      if (i > 0) {

        const a = this.particles[i];

        const b = this.particles[i - 1];

        const spring = new Spring(this.k, this.spacing, a, b);

        this.springs.push(spring);

      }

    }

  }

​

  update() {

    for (let i = 0; i < this.springs.length; i++) {

      this.springs[i].show(this.total - i);

      this.springs[i].update();

    }

​

    this.particles[0].isLocked = true;

    for (let particle of this.particles) {

      // particle.show();

      particle.update();

      particle.applyForce(this.wind);

    }

​

    let acc = random(-0.1, 0.1);

    this.wind.set(acc, -0.009);

  }

}