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


def draw():
	glClear(GL_COLOR_BUFFER_BIT)
	glColor3f(1, 1, 0)
	glBegin(GL_TRIANGLES)
	glVertex2f(0.0, 0.0)
	glVertex2f(0.4, 0.0)
	glVertex2f(0.8, 0.8)
	glEnd()
	glFlush()

def keyboard(key, x, y):
	if key == chr(27):
		sys.exit(0)

def reshape(w, h):
    glViewport(0, 0, w, h)
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    gluOrtho2D(-1, 1, -1.0*h/w, 1.0*h/w)
    glMatrixMode(GL_MODELVIEW)

glutInit([])
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB)
glutInitWindowSize(200, 200)
glutInitWindowPosition(0,0)
glutCreateWindow(sys.argv[0])
glutDisplayFunc(draw)
glutKeyboardFunc(keyboard)
glutReshapeFunc(reshape)
glutMainLoop()