int LED_Blau = 12;
int LED_Rot = 13;
int Taster_Rot = 7;
int Taster_Blau = 6;
int tasterrot, tasterblau;

void setup() {
pinMode(LED_Blau, OUTPUT);
pinMode(LED_Rot, OUTPUT);
pinMode(Taster_Rot, INPUT);
pinMode(Taster_Blau, INPUT);
}

void loop() {
tasterrot = digitalRead(Taster_Rot);
tasterblau = digitalRead(Taster_Blau);

  if((tasterrot == LOW) && (tasterblau == HIGH))
    do{
      digitalWrite(LED_Rot, HIGH);
      digitalWrite(LED_Blau, HIGH);
      delay(500);
      digitalWrite(LED_Rot, LOW);
      digitalWrite(LED_Blau, LOW);
      delay(500);
      tasterrot = digitalRead(Taster_Rot);
    }while(tasterrot == LOW);
  if((tasterrot == HIGH) && (tasterblau == LOW))
    do{
      digitalWrite(LED_Rot, LOW);
      digitalWrite(LED_Blau, HIGH);
      delay(500);
      digitalWrite(LED_Rot, HIGH);
      digitalWrite(LED_Blau, LOW);
      delay(500);
      tasterrot = digitalRead(Taster_Rot);
    }while(tasterrot == LOW);
  digitalWrite(LED_Rot, LOW);
  digitalWrite(LED_Blau, LOW);
  delay(1000);
}