# Create a 4 bit digital binary counter using Raspberry Pi PicoW
from time import sleep
from machine import Pin
led1=Pin(12,Pin.OUT)
led2=Pin(13,Pin.OUT)
led3=Pin(14,Pin.OUT)
led4=Pin(15,Pin.OUT)


for i in range(16):
    num = str(bin(i)[2:])
    length = len(num)
    if(length<4):
        for j in range(4-length):
            num="0"+num
    print(num)
    led1.value(int(num[3]))
    led2.value(int(num[2]))
    led3.value(int(num[1]))
    led4.value(int(num[0]))
    sleep(1)