void OnTriggerEnter2D(Collider2D col)
    {
        if (myZombieController.healthPoints > 0.0f)
        {
            if (col.gameObject.tag == "Player")
            {
                float distanceInX = gameObject.transform.position.x - col.gameObject.transform.position.x;
                if ((distanceInX > 0.0f && myZombieController.IsFlipOnX() == false) || (distanceInX < 0.0f && myZombieController.IsFlipOnX() == true))
                {
                    myZombieController.Flip();
                }

                myZombieController.SetWalkingSpeed(myZombieController.GetWalkingSpeed() * speedUp);
                myZombieController.isFollowingPlayer = true;
            }
        }
    }