from machine import Pin
import time

knopf1 = Pin(13, Pin.IN, Pin.PULL_DOWN)
knopf2 = Pin(8, Pin.IN, Pin.PULL_DOWN)
knopf3 = Pin(3, Pin.IN, Pin.PULL_DOWN)
rot = Pin(20, Pin.OUT)
gelb = Pin(19, Pin.OUT)
gruen = Pin(18, Pin.OUT)
rot.value(0)
gelb.value(0)
gruen.value(0)

while True:
    time.sleep(0.2)
    
    if knopf1.value() == 1:
        print("Knopf 1 gedrückt")
        rot.toggle()
    if knopf2.value() == 1:
        print("Knpf 2 gedrückt")
        gelb.toggle()
    if knopf3.value() == 1:
        gruen.toggle()