from pyglet.gl import *

window = pyglet.window.Window(600,500)

triPosX = 10
triPosY = 10
triDX = 1
triDY = 1
triRot = 0
triangle = pyglet.graphics.vertex_list(3, ('v2f', [-50,-50,  50,-50,  0,50]))

@window.event
def on_draw():
    glClear(GL_COLOR_BUFFER_BIT)

    glLoadIdentity()
    global triPosX, triPosY, triRot
    glTranslatef(triPosX, triPosY, 0)
    glRotatef(triRot, 0, 0, 1)

    glColor3f(1, 0, 0.7)
    triangle.draw(GL_TRIANGLES)



def update(dummy):
    global triPosX, triPosY, triDX, triDY, triRot

    if triPosX < 0:
        triDX = 1
    elif triPosX > 600:
        triDX = -1
    if triPosY < 0:
        triDY = 1
    elif triPosY > 500:
        triDY = -1

    triPosX += triDX * 5
    triPosY += triDY * 5
    triRot += 2


pyglet.clock.schedule_interval(update,1/60.0)
pyglet.app.run()