from machine import Pin,ADC
from time import sleep
led = Pin(4,Pin.OUT)
pot = ADC(Pin(34))
pot.atten(ADC.ATTN_11DB)
while True:
  x=pot.read()
  print(x/2000)
  led.on()
  sleep(x/2000)
  led.off()
  sleep(x/2000)