from machine import Pin 
import time

LED1 = Pin(7,Pin.OUT)
LED2 = Pin(8,Pin.OUT)
LED3 = Pin(9,Pin.OUT)
print("Hello, Pi Pico!")


while True :
  LED1.value(1)
  LED2.value(1)
  LED3.value(1)
  time.sleep(3)
  LED1.value(0)
  LED3.value(0)
  time.sleep(3)
  LED1.value(1)
  LED2.value(0)
  time.sleep(3)