// Function called when an object interacts with the collider (trigger) of the object.
    private void OnTriggerEnter(Collider other)
    {
        if (other.tag != "Player")
        {
            return;                                          // If anything but the player enters the collider (trigger) then return out of the fuction, else subtract 1 from the players lives.
        }
        Lives playerLives = other.GetComponent <Lives>();    // (Optimisation) Reference to the Lives script on the player so "GetComponent<>" doesn't get called more than once.

        playerLives.ChangeLives(playerLives.GetLives() - 1); // Subtracts 1 away from the player's current lives.
    }