from machine import Pin
import time
redled=Pin(21,Pin.OUT)
greenled=Pin(22,Pin.OUT)
button=Pin(5,Pin.IN,Pin.PULL_UP)
while True:
    print("-----------")
    if button.value()==0:
      redled.value(1)
      greenled.value(0)
      print("Red LED ON")
      time.sleep(1)
    else:
      greenled.value(1)
      redled.value(0)
      print("Green LED ON")
      time.sleep(1)