from machine import Pin
from time import sleep
from random import randint

def alles_doven (leds):
  for led in leds:
    led.value(0)

#oef 1

led_rood = Pin(16,Pin.OUT)
led_groen = Pin(18,Pin.OUT)
led_geel = Pin(21,Pin.OUT)
leds = []
leds.append(led_rood)
leds.append(led_groen)
leds.append(led_geel)
alles_doven(leds)
'''
while True:
  led_groen.value(1)
  led_geel.value(1)
  led_rood.value(0)


#oef 2
while True:
    for led in leds:
        led.value(1)
    sleep(1)
    for led in leds:
        led.value(0)
    sleep(1)


#oef 3
while True:
  for led in leds:
    led.value(1)
    sleep(2)
    led.value(0)
    sleep(1)
'''
#oef 4


while True:
  alles_doven(leds)
  sleep(1)
  leds[randint(0,2)].value(1)
  sleep(1)