from machine import Pin
from time import sleep

pins = [23, 22, 21, 19, 18]
led = [Pin(pin, Pin.OUT) for pin in pins]

# while True:  #accidental art, leave as is.
#     for led in leds:
#         led.value(1)
#         sleep(0.1)
#         led.value(0)
#         sleep(0.1)
#         led.value(1)
#         sleep(0.1)


while True:  # loading~!
    for i in range(len(led)):
        led[i].value(1)
        sleep(0.1)

    sleep(0.1)

    for i in range(len(led)):
        led[i].value(0)
        sleep(0.05)