from machine import Pin
from time import sleep

led_1 = Pin(0, Pin.OUT)
led_2 = Pin(1, Pin.OUT)
led_3 = Pin(2, Pin.OUT)
led_4 = Pin(20, Pin.OUT)
led_5 = Pin(19, Pin.OUT)

btn1 = Pin(28, Pin.IN, Pin.PULL_DOWN)

def ampel_gruen():
    led_1.off()
    led_3.on()

def ampel_rot():
    led_1.on()
    led_3.off()

def ampel_schalte(farbe, zeit=1):
    if farbe == "rot":
        ampel_rot()
        sleep(zeit)
    else:
        ampel_gruen()
        sleep(zeit)


ampel_gruen()
sleep(1)
ampel_schalte("rot", 5)
sleep(1)
ampel_schalte("gruen", 5)
ampel_rot()