from machine import ADC, Pin
from time import sleep

led_vert = Pin(21, Pin.OUT)
led_jaune = Pin(19, Pin.OUT)
led_rouge = Pin(18, Pin.OUT)

photoresistance = ADC(Pin(14))

while True:
    print(photoresistance.read())
    sleep(0.1)
    if photoresistance.read()<500:
        led_vert.value(1)
        sleep(1)
    elif photoresistance.read()<4000:
        led_vert.value(0)
        led_jaune.value(1)
        sleep(1)
    else:
        led_jaune.value(0)
        led_rouge.value(1)
        sleep(1)
        led_rouge.value(0)