from machine import Pin
import time

led1=Pin(2,Pin.OUT)
led2=Pin(16,Pin.OUT)
led3=Pin(14,Pin.OUT)
led4=Pin(17,Pin.OUT)


while True:
    led1.toggle()
    time.sleep(.1)

    led2.toggle()
    time.sleep(.1)

    led3.toggle()
    time.sleep(.1)
    
    led4.toggle()
    time.sleep(.1)