from machine import Pin
from utime import sleep

print("Hello, Pi Pico!")

ledR = Pin(5, Pin.OUT)
ledB = Pin(4, Pin.OUT)
ledB.value(1)
while True:
  ledR.value(1)
  ledB.value(0)
  sleep(0.5)
  ledR.value(0)
  ledB.value(1)
  sleep(0.5)