from time import sleep
from machine import Pin

rode_led = Pin(16,Pin.OUT)
gele_led = Pin(17,Pin.OUT)
drukknop_start = Pin(0,Pin.IN)
drukknop_stop = Pin(1,Pin.IN)
start = 0

while True:
    if drukknop_start.value() == 1:
        start = 1
    elif drukknop_stop.value() == 1:
        start = 0

    if start == 0:
        rode_led.value(0)
        gele_led.value(0)
    elif start == 1:
        rode_led.on()
        gele_led.off()
        sleep(0.3)
        rode_led.off()
        gele_led.on()
        sleep(0.3)