import time
from machine import Pin
led_jaune=Pin(23,Pin.OUT)
led_rouge=Pin(22,Pin.OUT)
led_verte=Pin(21,Pin.OUT)
while True:
led_jaune.value(1)
led_rouge.value(0)
led_verte.value(0)
time.sleep(1)
led_jaune.value(0)
led_rouge.value(1)
led_verte.value(0)
time.sleep(3)
led_jaune.value(0)
led_rouge.value(0)
led_verte.value(1)
time.sleep(3)