constructor(x, y, r) {

    this.pos = createVector(x, y);

    this.vel = createVector(1, -1);

    this.vel.mult(random(10));

    this.r = r;

    this.c = random(150, 360);

  }

​

  show() {

    noStroke(0);

    fill(this.c, 100, 100);

    circle(this.pos.x, this.pos.y, this.r);

  }

​

  update() {

    this.pos.add(this.vel);

    if ((this.pos.x > width) || (this.pos.x < 0)) {

      this.vel.x = this.vel.x * -1;

    }

    if ((this.pos.y > height) || (this.pos.y < 0)) {

      this.vel.y = this.vel.y * -1;

    }

  }

​

  check(other) {

    let d = dist(this.pos.x, this.pos.y, other.x, other.y);

    this.acc = p5.Vector.sub(other, this.pos);

    this.acc.setMag(1);

    this.vel.add(this.acc);

    this.vel.limit(10);

    if (d < 400) {

      stroke(this.c, 100, 100);

      strokeWeight(2);

      line(this.pos.x, this.pos.y, other.x, other.y);

    }

  }

}

​