from machine import Pin
from time import sleep
Pines = [23, 22, 21, 19, 18, 5, 17, 16, 4, 2]
Leds = [Pin (x, Pin.OUT) for x in Pines]

while True:
    for x in range (5):
        Leds [x].value (1)
        Leds [9-x].value (1)
        sleep (1)
        Leds [x].value (0)
        Leds [9-x].value (0)
    
    for x in range (3, 0, -1):
        Leds [x].value (1)
        Leds [9-x].value (1)
        sleep (1)
        Leds [x].value (0)
        Leds [9-x].value (0)