from machine import Pin
from time import sleep

Pines=[13,12,14,27,26,25,33,32,4,2]
Leds=[Pin(x,Pin.OUT)for x in Pines]

while True:
    for i in range (10):
        Leds[i].value(1)
        sleep(.2)
        Leds[i].value(0)
    for i in range (8,0,-1):
        Leds[i].value(1)
        sleep(.2)
        Leds[i].value(0)