// Update is called once per frame
    void Update()
    {
        // If the first mouse button(LMB) is tapped down:
        if (Input.GetMouseButtonDown(0))
        {
            // Getting the mid point of the screen whats basically the width/2 and height/2.
            Vector3 point = new Vector3(_camera.pixelWidth / 2, _camera.pixelHeight / 2, 0);

            // Method of Unity Script to configure raycasting.
            Ray ray = _camera.ScreenPointToRay(point);

            // Datatype what deals with intersections of the ray.
            RaycastHit hit;

            /*
             *  'out' ensures that the data structure manipulated within the command is the same
             *  object that exists outside the command.
             */
            if (Physics.Raycast(ray, out hit))
            {
                // Checking if the ray hits at which point.
                // Debug.Log("Hit: " + hit.point);

                // Coroutines does a job after with pauses indicated by the developer.
                // Create an object and deletes it afterwards.

                // The object that was hit.
                GameObject hitGameObject = hit.transform.gameObject;

                // For checking if the target has ReactiveTarget component.
                ReactiveTarget target = hitGameObject.GetComponent <ReactiveTarget>();

                if (target != null)
                {
                    // Debug.Log("Hit! " + ++_counter_of_hit);
                    target.react_to_hit();
                }
                else
                {
                    StartCoroutine(HitIndicator(hit.point));
                }
            }
        }
    }