from machine import Pin
from time import sleep

led_pins = [0,1,2,3]

leds = [Pin(pin_num , Pin.OUT) for pin_num in led_pins]

def decimal_to_binary(decimal):
    binary_str = bin(decimal)[2:]  
    return '0' * (4 - len(binary_str)) + binary_str 

def illuminate_leds(binary_str):
    for i in range(len(binary_str)):
        leds[i].value(int(binary_str[i]))


while True:
    try:
        number = int(input("bir sayı giriniz: "))
        if 0 <= number <= 15:
            binary_number = decimal_to_binary(number)
            illuminate_leds(binary_number)
        else:
            print("Lütfen geçerli bir sayı giriniz")
    except ValueError:
        print("geçersiz giriş")