// Globale Variablen

int s1; //blau
int s2; //rot
int warten;

// Initialisierung
void setup() {
  // put your setup code here, to run once:

pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(6, INPUT_PULLUP);
pinMode(7, INPUT_PULLUP);
}

// Endlosschleife
void loop() {
  // put your main code here, to run repeatedly:

s1 = digitalRead(7);
s2 = digitalRead(6);
warten = 500;

// Rote Lampe leuchtet
if (s1 == HIGH && s2 == HIGH)
{digitalWrite(9, HIGH);}

else
{digitalWrite(9, LOW);}


// Grüne Lampe blinkt
if (s2 == LOW && s1 == HIGH)
{
digitalWrite(10, HIGH);
delay(warten);
digitalWrite(10, LOW);
delay(warten);
}

else
{digitalWrite(10, LOW);}


// Blaue Lampe blinkt
if (s1 == LOW && s2 == HIGH)
{
digitalWrite(11, HIGH);
delay(warten);
digitalWrite(11, LOW);
delay(warten);
}

else
{digitalWrite(11, LOW);}


// Alle Lampen leuchten
if (s1 == LOW && s2 == LOW)
{
digitalWrite(9, HIGH);
digitalWrite(10, HIGH);
digitalWrite(11, HIGH);
}

else
{
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
}


}