from machine import ADC, Pin
from time import ticks_ms, ticks_diff, sleep_ms
led_blau = Pin(13, Pin.OUT)
led_gruen = Pin(14, Pin.OUT)
taster = Pin(15, Pin.IN, Pin.PULL_DOWN)
fotodiode = ADC(Pin(27))
zeit_blau = ticks_ms()
zeit_gruen = ticks_ms()
while True:
    wert = taster.value()
    print(wert)
    if wert == 1:
        led_blau.value(1)
        led_gruen.value(0)
    else:
        led_blau.value(0)
        led_gruen.value(1)
    sleep_ms(100)