constructor(x, y) {

    this.pos = createVector(x, y);

    this.vel = createVector(0, 0);

    this.acc = createVector(0, 0);

​

    this.d = 40;

    this.g = createVector(0, .9);

  }

  up(){

    this.vel = createVector(0, -20); 

  }

​

  show() {

    noStroke();

    fill(110);

    ellipse(this.pos.x, this.pos.y, this.d/2, this.d/2);

  }

​

  update() {

    this.acc.add(this.g);

    this.vel.add(this.acc);

    this.vel.mult(0.9);

    this.acc.mult(0);

​

    if (this.pos.y >= height - this.d + 30 || this.pos.y <= 0 + this.r/2 - 30) {

      this.vel = createVector(0,0)

    } else {

      this.pos.add(this.vel);

    }

​

  }

}