from machine import Pin
from time import sleep

indici = [5, 6, 7, 8, 9, 10]
leds = [Pin(i, Pin.OUT) for i in indici]

while True:
    for led in leds:
        led.value(1)
        sleep(1)
    for led in reversed(leds):
        led.value(0)
        sleep(1)