import sys, math, time
from OpenGL.GLUT import *
from OpenGL.GL import *
from OpenGL.GLU import *

red,green,blue = 0,0,0

def draw():
    global red,green,blue
    glClearColor(red, green, blue, 0)
    glClear(GL_COLOR_BUFFER_BIT)
    glFlush()

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

startTime = time.time()

def idle():
    global red, green, blue
    red = abs(math.sin(time.time()))
    green = abs(math.sin(time.time()/4))
    blue = abs(math.sin(time.time()*3 + 1))
    glutPostRedisplay()

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