#define startButton 2 // Pin für S1
#define stopButton 3// Pin für S2
#define relaisK1 8    // Pin für Stern
#define relaisK2  9    // Pin für Dreieck
#define relaisK3  10   // Pin für Betrieb

unsigned long starttime=0;
bool isRunning=false;
bool inStar=false;
 
 void setup()
 {
  pinMode(startButton,INPUT_PULLUP);
  pinMode(stopButton,INPUT_PULLUP);
  pinMode(relaisK1,OUTPUT);
  pinMode(relaisK2,OUTPUT);
  pinMode(relaisK3,OUTPUT);
  
digitalWrite(relaisK1, LOW);
digitalWrite(relaisK2, LOW);
digitalWrite(relaisK3, LOW);

 }
 void loop()
 {
if (digitalRead(startButton)==LOW)
  {isRunning=true;
  inStar=true;
  starttime=millis();
  digitalWrite(relaisK1,HIGH);
  digitalWrite(relaisK3,HIGH);
  }
if (digitalRead(stopButton)==LOW)
{isRunning=false;
inStar=false;
digitalWrite(relaisK1, LOW);
digitalWrite(relaisK2, LOW);
digitalWrite(relaisK3, LOW);
}
if (isRunning && (millis()-starttime>3000))
{
inStar=false ;
digitalWrite(relaisK1,LOW);
digitalWrite(relaisK2,HIGH);
digitalWrite(relaisK3, HIGH);
}
 }