Cannot turn script back on

Question

I've got an issue. When (Input.GetMouseButtonUp (0), Speedy script is disabled, thus we cannot enable it again from inside the script like shown below. How can we go around this?

public class  Speedy : MonoBehaviour {

GameObject car;

 if (speed == good)
    {
        GameObject car = GameObject.FindWithTag ("Car");

        if (Input.GetMouseButtonUp (0)) 
        {
            car.GetComponent<Speedy>().enabled = false;
        }

        else car.GetComponent<Speedy>().enabled = true;
    }
}

Answer 1

For this, you can use FindObjectOfType either.

FindObjectOfType gives you reference on relevant script once then you can play with it.

If I edit your code, then it should be something like this

public class  Controller : MonoBehaviour {

    Speedy car;

    Start()
    {
        car = FindObjectOfType<Speedy>();
    }

     if (speed == good)
        {

            if (Input.GetMouseButtonUp (0)) 
            {
                car.enabled = false;
            }

            else car.enabled = true;
        }

}

Drop this script to another GameObject in hierarchy.

NOTE: In your question you are disabling script from car but enabling if from cube. I don't know that you did it intentionally.