from machine import Pin
import time
led1 = Pin(2, Pin.OUT)
led2 = Pin(4, Pin.OUT)
count = 0
while True:
    count += 1
    print(count)
    led1.on()
    print('LED1 ON')
    time.sleep(0.5)
    led1.off()
    print('LED1 OFF')
    time.sleep(0.5)
    led2.on()
    print('LED2 ON')
    time.sleep(0.5)
    led2.off()
    print('LED2 OFF')
    time.sleep(0.5)