How to use the pythreejs.Line function in pythreejs

colors = [colors for v in vertices]
    else:
        colors = np.asarray(colors)
        if (colors.shape == (sheet.Nv, 3)) or (colors.shape == (sheet.Nv, 4)):
            sheet.vert_df["hex_c"] = [mpl_colors.rgb2hex(c) for c in colors]
            srce_c = sheet.upcast_srce(sheet.vert_df["hex_c"])
            trgt_c = sheet.upcast_trgt(sheet.vert_df["hex_c"])
            colors = np.vstack([srce_c.values, trgt_c.values]).T.reshape(
                vertices.shape[0]
            )
            colors = list(colors)
        else:
            raise ValueError

    linesgeom = py3js.PlainGeometry(vertices=[list(v) for v in vertices], colors=colors)
    return py3js.Line(
        geometry=linesgeom,
        material=py3js.LineBasicMaterial(
            linewidth=spec["edge"]["width"], vertexColors="VertexColors"
        ),
        type="LinePieces",
    )

material = p3js.LineBasicMaterial(color=color, linewidth=4)

    scene_children = []
    # For each 24 joint
    if links is None:
        links = [
            (0, 1, 2, 3, 4),
            (0, 5, 6, 7, 8),
            (0, 9, 10, 11, 12),
            (0, 13, 14, 15, 16),
            (0, 17, 18, 19, 20),
        ]
    for link in links:
        for j1, j2 in zip(link[0:-1], link[1:]):
            geometry = p3js.Geometry(vertices=joints3D[(j1, j2), :].tolist())
            line = p3js.Line(geometry, material)
            scene_children.append(line)
    return scene_children

w = ray.wavelength
    rc, gc, bc = wavelength2RGB(w)
    rc=int(255*rc)
    gc=int(255*gc)
    bc=int(255*bc)
    material = py3js.LineBasicMaterial(color = "#{:02X}{:02X}{:02X}".format(rc,gc,bc))



    rl = ray2list(ray)

    for r in rl:
        geometry = py3js.Geometry()
        geometry.vertices =  r
        line = py3js.Line( geometry, material)
        rays.add(line)

    return rays

def lines_children(origins, targets, color="blue"):
    material = p3js.LineBasicMaterial(color=color, linewidth=4)

    scene_children = []
    # For each 24 joint
    for origin, target in zip(origins, targets):
        geometry = p3js.Geometry(vertices=np.array([origin, target]).tolist())
        line = p3js.Line(geometry, material)
        scene_children.append(line)
    return scene_children