from machine import Pin
import time
led1 = Pin(2, Pin.OUT)
led2 = Pin(4, Pin.OUT)
led3 = Pin(5, Pin.OUT)
led4 = Pin(16, Pin.OUT)
led5 = Pin(17, Pin.OUT)
led6 = Pin(18, Pin.OUT)
led7 = Pin(14, Pin.OUT)
led8 = Pin(13, Pin.OUT)

button_in = Pin(34, Pin.IN)
button_out = Pin(35, Pin.IN)

counter=0

while True:
    if button_in.value() == 1 and counter < 8 :  
        counter += 1
        time.sleep(0.3)
        if counter == 1:
           led1.value(1)
        elif counter == 2:
           led2.value(1)
        elif counter == 3:
           led3.value(1)
        elif counter == 4:
           led4.value(1)
        elif counter == 5:
           led5.value(1)
        elif counter == 6:
           led6.value(1)
        elif counter == 7:
           led7.value(1)
        elif counter == 8:
           led8.value(1)
  
    if button_out.value() == 1 and counter > 0 :
        if counter ==8:
           led8.value(0)
        elif counter == 7:
           led7.value(0)
        elif counter == 6:
           led6.value(0)
        elif counter == 5:
           led5.value(0)
        elif counter == 4:
           led4.value(0)
        elif counter == 3:
           led3.value(0)
        elif counter == 2:
           led2.value(0)
        elif counter == 1:
           led1.value(0)
        counter -= 1
        time.sleep(0.3)