from machine import Pin
from time import sleep
bt1=(15,Pin.OUT,Pin.ouT)
led(1)=Pin(21,Pin.OUT)
led(2)=Pin(22,Pin.Out)
led(3)=Pin(23,Pin.OUT)
while(True):
led(1).value(True)
sleep(2)
led(1).value(False)
sleep(2)
led(2).value(True)
sleep(2)
led(2).value(False)
sleep(2)
led(3).value(True)
sleep(2)
led(3).value(False)
sleep(2)
if:
led(1) .off()
led(2) .off()
led(3) .off()