// Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            Ray        ray = Cam.ScreenPointToRay(Input.mousePosition);
            RaycastHit hit;
            if (Physics.Raycast(ray, out hit))
            {
                ClickObject tCO = hit.transform.gameObject.GetComponent <ClickObject>();


                tCO?.OnClick(); //New way to avoid writing if(not null) {}
            }
        }
    }