from machine import Pin
from time import sleep

leds = [Pin(x, Pin.OUT) for x in range(10)]
velocidad = 1 

while True:
    for x in range(1, 4):
        leds[x].on()
        leds[x+3].on()
        leds[x+6].on()
        sleep(velocidad)
        leds[x].off()
        leds[x+3].off()
        leds[x+6].off()
   
    for x in range(5):              
        leds[4 - x].on()            
        leds[5 + x].on()           
        sleep(velocidad)            

    for x in range(10):          
        leds[x].off()