def main():
    glutInit(sys.argv)
    glutInitDisplayMode((GLUT_SINGLE | GLUT_RGB))
    glutInitWindowSize(500, 500)
    glutInitWindowPosition(50, 50)
    glutCreateWindow(b'plot_all_points')
    glutDisplayFunc(plot_points)
    init()
    glutMainLoop()
def main():
    glutInit(sys.argv)
    glutInitDisplayMode((GLUT_SINGLE | GLUT_RGB))
    glutInitWindowSize(500, 500)
    glutInitWindowPosition(50, 50)
    glutCreateWindow(b'plot_all_points')
    glutDisplayFunc(plot_points)
    init()
    glutMainLoop()