import machine
import time

time.sleep(0.1) # Wait for USB to become ready
led = machine.Pin("LED", machine.Pin.OUT)   # Special name for Pico W
led26 = machine.Pin(26, machine.Pin.OUT)
led27 = machine.Pin(27, machine.Pin.OUT)
led28 = machine.Pin(28, machine.Pin.OUT)
print("Hello, Pi Pico W!")

while True:
    led.on()
    led26.on()
    led27.on()
    led28.on()
    time.sleep(0.5)
    led.off()
    led26.off()
    led27.off()
    led28.off()
    time.sleep(0.5)