this.top= random(height/2 -25); 

  this.bottom = random(height/2-25); 

  this.x =width; 

  this.w = 20; 

  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(18, 104, 27);

    if(this.highlight){

     fill(255,0,100);  

    }

    rect (this.x, 0, this.w, this.top); 

    rect (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;

    }

  }

}