import time
import machine                         #from machine import time
led=machine.Pin(2,machine.Pin.OUT)     #led=Pin(2,Pin.OUT)
while True:
    led.value(1)
    time.sleep(0.2)
    led.value(0)
    time.sleep(0.2)   
    led.value(1)
    time.sleep(0.2)
    led.value(0)
    time.sleep(0.5)