import time
import machine

pinA = machine.Pin(20, machine.Pin.OUT)
pinB = machine.Pin(21, machine.Pin.OUT)
pinC = machine.Pin(22, machine.Pin.OUT)

arreglo = [
 [pinB,pinA,pinC],
 [pinA,pinB, pinC],
 [pinC, pinB, pinA],
 [pinB, pinC, pinA],
 [pinC,pinA,pinB],
 [pinA,pinC,pinB]
]

def encender(alto, bajo, entrada):

  alto.init(machine.Pin.OUT)
  alto.value(1)
  bajo.init(machine.Pin.OUT) 
  bajo.value(0)
  entrada.init(machine.Pin.IN)

while True:
    for led in range(6):
        encender(arreglo[led][0],arreglo[led][1],arreglo[led][2])