from machine import Pin
from time import sleep

#set up Pin 15 as an output
led=Pin(2,Pin.OUT)

#Blink the LED in an infinite loop
while True:
    led.on()   #Trun on the LED
    sleep(1)   #sleep for 1 second
    led.off()    #Trun off the LED
    sleep(1)   #sleep for 1 second