from machine import Pin
from time import sleep
led1=Pin(2,Pin.OUT)
led2=Pin(3,Pin.OUT)
led2=Pin(4,Pin.OUT)
led2=Pin(5,Pin.OUT)
def DisplayBinary(decimalNumber):
    binaryString='{0.04b}'.format(decimalNumber)
    print(binaryString)
    led1.value(int(binaryString[3]))
    led1.value(int(binaryString[2]))
    led1.value(int(binaryString[1]))
    led1.value(int(binaryString[0]))
while True:
    led1.on()
    sleep(0.5)
    led2.on()
    sleep(0.5)