#!/usr/bin/env python3

from gpiozero import LED
from gpiozero import Button
from time import sleep

led = LED(25)
button = Button(21)

def pressed():
    led.on()
    print("button pressed. LED on")

def released():
    led.off()
    print("button released. LED off")

button.when_pressed = pressed
button.when_released = released
print("ready")

while True:
    sleep(0.2)