from machine import ADC,Pin,PWM
from time import sleep

ldr=ADC(Pin(4))
led=PWM(Pin(13),5000)

ldr.width(ADC.WIDTH_10BIT)
ir=Pin(12,Pin.OUT)

while True:
    x=ldr.read()
    y=ir.value()
    if(y==1):
        led.duty(x)
    else:
        led.duty(0)