from machine import Pin
from time import sleep
led1 =Pin(17,Pin.OUT)
led2 =Pin(16,Pin.OUT)
while True:
    led1.value(1)
    sleep(1)
    led1.value(0)
    sleep(1)
    led2.value(1)
    sleep(1)
    led2.value(0)
    sleep(1)