How to use the meshcat.geometry.Line function in meshcat

An optional colour specified as a hex integer. The default colour is
                white.

            Returns
            -------
            identifier : str
                The string identifier used to add the line to the scene.
        """
        vis = self.vis
        line = (start, end)
        self._will_add_expendable_to_scene(line)
        vertices = np.column_stack(line)
        assert vertices.shape[0] == 3  # easy to get this wrong
        identifier = self.get_next_identifer()
        vis[identifier].set_object(
            g.Line(
                g.PointsGeometry(vertices),
                g.MeshBasicMaterial(color=colour, transparency=False, opacity=1),
            )
        )
        self._did_add_expendable_to_scene(identifier)
        return identifier

--------
            add_ray_path : Draws the line using individual line segments. Use this 
            method when each line segment needs to be drawn with a different colour.
        
            Returns
            -------
            identifier : str
                The string identifier used to add the line to the scene.
        """
        vis = self.vis
        self._will_add_expendable_to_scene(vertices)
        vertices = np.array(vertices)
        assert vertices.shape[0] == 3  # easy to get this wrong
        identifier = self.get_next_identifer()
        vis[identifier].set_object(
            g.Line(
                g.PointsGeometry(vertices),
                g.MeshBasicMaterial(color=colour, transparency=False, opacity=1.0),
            )
        )
        self._did_add_expendable_to_scene(identifier)
        return identifier