from machine import ADC, Pin
from time import sleep

LedV = Pin(21, Pin.OUT)
LedJ = Pin(19, Pin.OUT)
LedR = Pin(18, Pin.OUT)
photor = ADC(Pin(25))

def init_leds():
    LedV.value(0)
    LedJ.value(0)
    LedR.value(0)

while True:
    init_leds()
    lum = 4096-photor.read()
    print(lum)
    if lum < (0.3*4096):
        LedR.value(1)
    elif lum < (0.6*4096):
        LedJ.value(1)
    else:
        LedV.value(1)