from machine import Pin 
import time

led1 = Pin(0, Pin.OUT)
led2 = Pin(4, Pin.OUT)
led3 = Pin(16, Pin.OUT)

a = 1
while a:
  for led in (led1,led2,led3):
      led.value(1)
      time.sleep(3)
      led.value(0)
  a =0

  

while True:
  led1.value(1)
  time.sleep(5)
  led1.value(0)

  led2.value(1)
  time.sleep(2)
  led2.value(0)

  led3.value(1)
  time.sleep(2)
  led3.value(0)