from machine import Pin, PWM
from time import sleep
buzzer = PWM( Pin(15), freq=1250) #choisir la note musicale a jouer en changeant freq du PWM 
while True:
    buzzer. duty(512) # set the volume by changing the PWM duty value
                                #choisir volume du buzzer
    sleep(1)
    buzzer.duty(0) # volume du buzzer = 0 
    sleep(1)
    buzzer.init( freq=2500, duty=512)#choisir la note musicale a jouer en changeant freq du PWM 
                               # set the volume by changing the PWM duty value
                                #choisir volume du buzzer
    sleep(1)
    buzzer.duty(0) # volume du buzzer = 0 
    sleep(1)
    buzzer.freq(1250)