from machine import Pin
from utime import sleep

led1 = Pin(2, Pin.OUT)
led1.value(0)
led2 = Pin(4, Pin.OUT)
led2.value(0)
led3 = Pin(5, Pin.OUT)
led3.value(0)
led4 = Pin(13, Pin.OUT)
led4.value(0)
led5 = Pin(14, Pin.OUT)
led5.value(0)
led6 = Pin(16, Pin.OUT)
led6.value(0)
led7 = Pin(17, Pin.OUT)
led7.value(0)
led8 = Pin(18, Pin.OUT)
led8.value(0)

leds = [led1, led2, led3, led4, led5, led6, led7, led8]


button_enter = Pin(34, Pin.IN, Pin.PULL_DOWN)
button_exit = Pin(35, Pin.IN, Pin.PULL_DOWN)

sleep(0.1) 

occupied_spaces = 0

def update_leds():
    for i in range(8):
        if i < occupied_spaces:
            leds[i].value(1)
        else:
            leds[i].value(0)

def wait_for_release(button):
    
    while button.value() == 1:
        sleep(0.01)


update_leds()

while True:
    if button_enter.value() == 1 and occupied_spaces < 8:
        wait_for_release(button_enter)
        occupied_spaces += 1
        update_leds()
        sleep(0.1)
        
    if button_exit.value() == 1 and occupied_spaces > 0:
        wait_for_release(button_exit)
        occupied_spaces -= 1
        update_leds()
        sleep(0.5)