int led = 13;
int redLed = 6;

int schalter = A0;
int poti = A1;

int potVal;
int helligkeit = 0;
int fade = 5;

boolean isOn = false;
int clicktime = 0;
int acttime;

void setup() {
  pinMode(led, OUTPUT);
  pinMode(redLed, OUTPUT);

  pinMode(schalter, INPUT);
  pinMode(poti, INPUT);
}

void loop() {
  acttime = millis();
  if(digitalRead(schalter) && (acttime - clicktime > 200)){
    clicktime = acttime;
    if(isOn){
      digitalWrite(led, LOW);
      isOn = false;
    }else{
      digitalWrite(led, HIGH);
      isOn = true;
    }
  }

  helligkeit = helligkeit + fade;

  if (helligkeit <= 0 || helligkeit >= 255) {
    fade = -fade;
  }

  analogWrite(redLed, helligkeit);

  potVal = analogRead(poti) / 64;

  delay(potVal);
}