from machine import Pin
import machine 
import time

led = Pin(19, Pin.OUT)
button = Pin(20, Pin.IN, Pin.PULL_UP)

#led = machine.Pin(19, machine.Pin.OUT)
#button = machine.Pin(20, machine.Pin.IN, machine.Pin.PULL_UP)

while True:
  if not button.value():
    led.on()
    time.sleep(0.1)
  else:
    led.off()
    time.sleep(0.1)