from machine import Pin
from utime import sleep

# Define pins for the LEDs
led_pins = [Pin(9, Pin.OUT), Pin(12, Pin.OUT), Pin(2, Pin.OUT), Pin(28, Pin.OUT), Pin(5, Pin.OUT),Pin(20, Pin.OUT)]

# Turn off all LEDs initially
for led in led_pins:
    led.off()

while True:
    for led in led_pins:
        led.on()   # Turn on the current LED
        sleep(0.5) # Wait for half a second
        led.off()  # Turn off the current LED before moving to the next one

    # Reverse order: LEDs on in reverse sequence
    for led in reversed(led_pins):
        led.on()
        sleep(0.5)
        led.off()