from machine import Pin,ADC
from time import sleep
led=Pin(4,Pin.OUT)
pot=ADC(Pin(34))
pot.atten(ADC.ATTN_11 DB) #3.3V
poy.width(ADC.WIDTH_!2 BIT) #Resolution=12bit
while True:
    rate=pot.read()
    print(rate)
    led.on()
    sleep()
    led.off()
    sleep()