from machine import Pin,ADC
from time import sleep
LED1=Pin(2,Pin.OUT)
LED2=Pin(3,Pin.OUT)
LED3=Pin(4,Pin.OUT)
LDR=ADC(26)
while True:
    a=LDR.read_u16()
    print(a)
    if(a>60000):
        LED1.value(1)
        LED2.value(0)
        LED3.value(0)
    if(a<20000):
        LED3.value(1)
        LED2.value(0)
        LED1.value(0)
    if(20000<a<60000):
        LED2.value(1)
        LED1.value(0)
        LED3.value(0)