import time
from machine import Pin
time.sleep(0.1) # Wait for USB to become ready

print("Hello, Pi Pico W!")

led_ext = Pin(15, Pin.OUT)

led = Pin('LED', Pin.OUT) # creating a reference from the built-in led to a python variable
#toggle of led
while True:
  led.toggle()
  time.sleep(1)
  led_ext.toggle()