#define KNOPFA 2
#define KNOPFB 3

#define LEDA 8
#define LEDB 9

#define MAXWAIT 100
#define MUL 100

void setup() {
  pinMode(KNOPFA, OUTPUT);
  pinMode(KNOPFB, OUTPUT);

  pinMode(LEDA, INPUT);
  pinMode(LEDB, INPUT);

  Serial.begin(9600);     
  Serial.println("Setupdone");
}

void check_end(int stat) {
  Serial.println("check_end()");
  if(stat == 1) { // 1 - A Verloren -> LEDB an
    digitalWrite(LEDB, HIGH);
    digitalWrite(LEDA, LOW);
  } else if(stat == 2) { // 1 - B Verloren -> LEDA an
    digitalWrite(LEDA, HIGH);
    digitalWrite(LEDB, LOW);
  }
}

void loop() {
  Serial.println("Start");
  //lampen an
  digitalWrite(LEDA, HIGH);
  digitalWrite(LEDB, HIGH);

  delay(5000); //5s warten
  
  //lampen aus
  digitalWrite(LEDA, LOW);
  digitalWrite(LEDB, LOW);

  delay(200);
  
  int wait = (analogRead(0) + analogRead(1)) % MAXWAIT;
  if(wait < 1) wait = analogRead(2) % MAXWAIT;
  wait++;
  
  Serial.print("wait: ");
  Serial.println(wait, DEC);
  int state = 0; // 0 - running, 1 - A Verloren, 2 - B Verloren
  
  //prüfen, das keiner zu früh drückt.
  for(int i = 0; i < wait; i++) {
    delay(MUL);
    if(digitalRead(KNOPFA) == 1) {
      //A Verloren
      state = 1;
      break;
    }
    if(analogRead(KNOPFB) == 1) {
      //B Verloren
      state = 2;
      break;
    }
  }
  check_end(state);
  if(state > 0) {
    delay(5000);
    return;
  }

  //lampen an
  Serial.println("GOOO");
  digitalWrite(LEDA, HIGH);
  digitalWrite(LEDB, HIGH);

  //prüfen wer als erstes drückt
  while(true) {
    if(digitalRead(KNOPFA) == 1) {
      //B Verloren
      check_end(2);
      break;
    }
    if(digitalRead(KNOPFB) == 1) {
      //A Verloren
      check_end(1);
      break;
    }
  }

  Serial.println("Ende");
  delay(5000); //5 sec nichts machen
}