void Start()

  {

    if (Input.GetMouseButtonDown(0))

    {

      toword *= -1;

      direction *= -1;

    void update()

      {

        if (Input.GetMouseButtonDown(0))

        {

          toword *= -1;

          direction *= -1;

        }

        if (transform.position.x < 2.8f)

        {

          direction = -0.05f;

          toword = -1.0f;

        }

        if (transform.position.x < -2.8f)

        {

          direction = 0.05f;

          toword = 1.0f;

    }

    transform.localScale = new Vector3(toword, 1, 1);

    transform.position += new Vector3(direction, 0, 0);

   } 

맨 밑에 빨간 줄이 왜 생기는지 모르겠네요, 어느 부분에서 오류가 난 건지 보이질 않네요-