from machine import Pin
from time import sleep
# Define the pins
LED1 = Pin(5, Pin.OUT)
LED2 = Pin(9, Pin.OUT)
LED3 = Pin(13, Pin.OUT)

# Infinite loop
while True:
    # Turn the LEDs on
    LED1.on()
    LED2.on()
    LED3.on()
# Wait for 0.5 seconds
    sleep(1)

# Turn the LEDs off
    LED1.off()
    LED2.off()
    LED3.off()

# Wait for 0.5 seconds
    sleep(1)