import pgzrun

TITLE = "Paf l'oiseau"
WIDTH = 400
HEIGHT = 708

def on_mouse_down(button):
    print('Clic', button)
    if button == mouse.RIGHT :
        titi.speed += 1
    elif button == mouse.LEFT :
        titi.speed -= 1

def update():
    titi.x += titi.speed
    if titi.left > WIDTH :
        titi.right = 0
    if titi.right < 0 :
        titi.left = WIDTH

def draw():
    screen.blit('background', (0, 0))
    titi.draw()

titi = Actor('bird1', (75, 350))
titi.speed = 1

pgzrun.go()