import machine
import utime
import _thread

led = machine.Pin(0,machine.Pin.OUT)
led1 = machine.Pin(1,machine.Pin.OUT)

def ad_thread():

   while True:

    led1.value(0)
    utime.sleep(3)
    led1.value(1)
    utime.sleep(3)
    
_thread.start_new_thread(ad_thread, ())

while True:
    led.value(1)
    utime.sleep(1)
    led.value(0)
    utime.sleep(1)