from machine import Pin
import time

# Initialize 8 LEDs on GPIO pins 15 to 22
led_pins = [Pin(i, Pin.OUT) for i in range(8, 15)]

while True:
    for led in led_pins:  # Iterate through each LED
        led.value(1)      # Turn on the LED
        time.sleep(0.5)   # Wait for 0.5 seconds
        led.value(0)      # Turn off the LED
        time.sleep(0.5)