import time
from machine import Pin
pin2 = Pin(2,Pin.OUT) 
pin4 = Pin(4,Pin.OUT)
pin5 = Pin(5,Pin.OUT)
pin18 = Pin(18,Pin.OUT)

i = 1
while i <= 10:
    print(i, end = ', ')
    i = i + 1
    pin2.on()
    print ("LED ON ")
    time.sleep(0.5)
    pin2.off()
    print ("LED OFF ")
    time.sleep(0.5)

    pin4.on()
    print ("LED ON ")
    time.sleep(0.5)
    pin4.off()
    print ("LED OFF ")
    time.sleep(0.5)

    pin5.on()
    print ("LED ON ")
    time.sleep(0.5)
    pin5.off()
    print ("LED OFF ")
    time.sleep(0.5)

    pin18.on()
    print ("LED ON ")
    time.sleep(0.5)
    pin18.off()
    print ("LED OFF ")
    time.sleep(0.5)