from machine import Pin
from utime import sleep, sleep_ms
import _thread

Leds = [Pin(15, Pin.OUT), Pin(2, Pin.OUT), Pin(4, Pin.OUT), Pin(5, Pin.OUT), Pin(18, Pin.OUT), Pin(19, Pin.OUT), Pin(21, Pin.OUT), Pin(22, Pin.OUT)]

def tarea_uno():
    while True:
        for i in Leds[0:4:1]:
            i.value(1)
            sleep_ms(100)
            i.value(0)
            sleep_ms(100)
_thread.start_new_thread(tarea_uno,())

def tarea_dos():
    for i in Leds[7:3:-1]:
        i.value(1)
        sleep_ms(100)
        i.value(0)
        sleep_ms(100)

while True:
    tarea_dos()