from machine import Pin
from utime import sleep

led=Pin(3,Pin.OUT)
#led1=Pin(2,Pin.OUT)
#led2=Pin(28,Pin.OUT)
while True:
  led.toggle()
  sleep(1)
  #led1.toggle()
  #sleep(1)
  #led2.toggle()
  #sleep(1)
#Green GP2
#Green GP3
#Green GP28
#Black GND2
#Black GND3
#Black GND8