from machine import Pin
from time import sleep_ms

PORTA = [16,17,18,19,20,21,22,26]
for i in range(0, len(PORTA)):
    PORTA[i] = Pin(PORTA[i],Pin.OUT)

def display():
    X = ''
    n = len(PORTA)
    for i in range(0, n):
        X += str(PORTA[n-i-1].value)
    print(X)

def BinaryOut(X):
    for i in range(0, len(PORTA)):
        if(X & (1 << i)):
           PORTA[i].value(1)
        else:
           PORTA[i].value(0)

for i in range(0, 65535):
    BinaryOut(i)
    display()
    sleep_ms(50)

BinaryOut(0)