var spacing = 160;

  var center = random(spacing, height - spacing);

  this.top = center - spacing / 2;

  this.bottom = height - (center + spacing / 2);

  this.x = width;

  this.w = 70;

​

  this.speed = 2;

  this.highlight = false;

  this.hits = function (bird) {

    if (bird.y < this.top || bird.y > height - this.bottom) {

      if (bird.x > this.x && bird.x < this.x + this.w) {

        this.highlight = true;

        return true;

      }

      this.highlight = false;

      return false;

    }

  };

  this.show = function () {

    fill(255, 0, 0);

    image(pipeRevImg, this.x, 0, this.w, this.top);

​

    fill(0, 255, 0);

    image(pipeImg, this.x, height - this.bottom, this.w, this.bottom);

  };

  this.update = function () {

    this.x -= this.speed;

  };

  this.offscreen = function () {

    if (this.x < -this.w) {

      return true;

    } else {

      return false;

    }

  };

}

​