#programmer : thidarat tapha
import time
from machine import Pin

pin2 = Pin(2, Pin.OUT)
pin4 = Pin(4, Pin.OUT)

pin2.on()
pin4.on()
time.sleep(1)
pin2.off()
pin4.off()
time.sleep(1)
pin2.on()
pin4.on()
time.sleep(1)
pin2.off()
pin4.off()