led_pins = [17, 20, 18]
button_pins = [26, 22, 21]


leds = [LED(pin) for pin in led_pins]
buttons = [Button(pin) for pin in button_pins]

def acionar_led(index):
 
    for led in leds:
        led.off()

    leds[index].on()

try:
    while True:
      
        for i, button in enumerate(buttons):
            if button.is_pressed:
                acionar_led(i)
                break
        sleep(0.1)

except KeyboardInterrupt:

    pass
finally:

    for led in leds:
        led.off()