constructor(velocity, amplitude) {

    this.angle = createVector();

    this.position = createVector();

    this.velocity = velocity;

    this.amplitude = amplitude;

  }

​

  oscillate() {

    this.angle.add(this.velocity);

    this.position.x = this.amplitude.x * sin(this.angle.x);

    this.position.y = this.amplitude.y * sin(this.angle.y);

  }

​

  display() {

    push();

    translate(width / 2, height / 2);

    stroke(0);

    fill(175);

    line(0, 0, this.position.x, this.position.y);

    circle(this.position.x, this.position.y, 16);

    pop();

  }

}

​