void OnTriggerEnter2D(Collider2D other)
    {
        /* When Player meets collider, calls for MainCharacterController method ChangeHealth().
         * Destroys HealthObject.
         */

        MainCharacterController controller = other.GetComponent <MainCharacterController>();

        if (controller != null)
        {
            controller.ChangeHealth(health);
            Destroy(gameObject);
        }
    }
    void OnTriggerStay2D(Collider2D other)
    {
        /* Collider launches the change when C is pressed within the collider. */

        MainCharacterController controller = other.GetComponent <MainCharacterController>();

        if (controller != null && Input.GetKey("c"))
        {
            Debug.Log("C pressed");

            if (normal.active == true)
            {
                /* Normal sprite is deactivated and Changed sprite is activated. Using this, costs player health. */

                Debug.Log("Lohko 1");
                normal.SetActive(false);
                changed.SetActive(true);

                controller.ChangeHealth(-1);
            }
        }
    }