from machine import Pin
from time import sleep

led_pins = [2,4,5,13,14,16,17,18]
leds = [Pin(pin, Pin.OUT) for pin in led_pins]

entrance_button = Pin(34, Pin.IN)
exit_button = Pin(35, Pin.IN)

car_count = 0

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

prev_entrance = 0
prev_exit = 0

while True:
    entrance = entrance_button.value()
    exit = exit_button.value()

    if entrance == 1 and prev_entrance == 0:
        if car_count < 8:
            car_count += 1
            update_leds(car_count)
        sleep(0.2)

    if exit == 1 and prev_exit == 0:
        if car_count > 0:
            car_count -= 1
            update_leds(car_count)
        sleep(0.2)

    prev_entrance = entrance
    prev_exit = exit
    sleep(0.05)