from machine import Pin
from utime import sleep

led1 = Pin(1, Pin.OUT)
led2 = Pin(26, Pin.OUT)
led3 = Pin(9, Pin.OUT)

# while True:
#   led1.value(1)
#   sleep(0.5)
#   led1.value(0)
#   sleep(0.5)
#   led2.value(1)
#   sleep(1.5)
#   led2.value(0)
#   sleep(1.5)
#   led3.value(1)
#   sleep(2.5)
#   led3.value(0)
#   sleep(2.5)

while True:
  led1.value(1)
  led2.value(1)
  led3.value(1)
  sleep(0.5)
  led1.value(0)
  led2.value(0)
  led3.value(0)
  sleep(0.5)