from OpenGL.GL import *
from OpenGL.GLUT import *
from OpenGL.GLU import *
import sys

def display():
    glClearColor(0,0,0,0)
    glClear(GL_COLOR_BUFFER_BIT)
    glBegin(GL_TRIANGLES)
    glVertex2f(-0.5,-0.5)
    glVertex2f(0.5,0.0)
    glVertex2f(0.0,0.5)
    glEnd()
    glFlush()

def main():
    glutInit(sys.argv)
    glutInitDisplayMode(GLUT_RGB)
    glutInitWindowPosition(200,200)
    glutInitWindowSize(250,250)
    glutCreateWindow("Un triangle")
    glutDisplayFunc(display)
    glutMainLoop()

main()