from machine import Pin,Timer
import time

led1=Pin(0,Pin.OUT)
led2=Pin(2,Pin.OUT)
led3=Pin(4,Pin.OUT)
led4=Pin(5,Pin.OUT)
led5=Pin(6,Pin.OUT)
led6=Pin(7,Pin.OUT)
led7=Pin(8,Pin.OUT)
led8=Pin(9,Pin.OUT)


n=7
if  n>=0 and n<=15:
    x=n%2
    n=n//2
    y=n%2
    n=n//2
    z=n%2
    n=n//2
    a=n%2
    
    if x==1:
        led1.on()
    if y==1:
        led2.on()
    if z==1:
        led3.on()
    if a==1:
        led4.on()