from machine import Pin
import time
button1=Pin(4,Pin.IN,Pin.PULL_UP)
led1=Pin(2,Pin.OUT)
led2=Pin(3,Pin.OUT)
while True:
  if button1.value()==0:
      led1.value(1)
      led1.value(0)
      print("led1 on")
      print("============")
      time.sleep(0.5)
  else:
     led2.value(1)
     led2.value(0)
     print("led2 on")
     print("=============")
     time.sleep(0.5)