from machine import Pin
import time
button=Pin(4,Pin.IN,Pin.PULL_UP)
led1=Pin(2,Pin.OUT)
led2=Pin(3,Pin.OUT)
while True:
 if button.value()==0:
  led1.value(1)
  led2.value(0)
  print("LED 1 ON")
  time.sleep(0.1)
 else:
  led1.value(0)
  led2.value(1)
  print("LED 2 ON")
  time.sleep(0.1)