import machine
import time

rode_led = machine.Pin(27, machine.Pin.OUT)
drukknop_aan = machine.Pin(19, machine.Pin.IN)
drukknop_uit = machine.Pin(20,machine.Pin.IN)

while True:
    start = drukknop_aan.value()

    while drukknop_aan.value() == 1:
        rode_led.value(1)
        time.sleep_ms(250)
        rode_led.value(0)
        time.sleep_ms(250)
    while drukknop_uit.value == 1:
        rode_led.value(0)