int rot_pkw = 5;
int gelb_pkw = 6;
int gruen_pkw =7;

int rot_f = 8;
int gruen_f = 9;

int taster_f = 4;

int interval1 = 5000;
int interval2 = 1000;
int interval3 = 4000;
int interval4 = 1000;
int interval5 = 10000;

int zustand = 0;

unsigned long previousMillis = 0;

bool tasterstate = false;


void setup () {
  for(int i =5; i >= 9; i++){
    pinMode(i, OUTPUT);
  }

  pinMode (taster_f, INPUT_PULLUP);

digitalWrite(gruen_pkw, HIGH);
digitalWrite(rot_f, HIGH);

}

void loop () {

unsigned long currentMillis = millis();
bool taster_zustand = digitalRead(taster_f);

if(taster_zustand == 0){
  tasterstate = true;
}

if(zustand == 0 && currentMillis - previousMillis >= interval1) {
previousMillis = currentMillis;
digitalWrite(gruen_pkw, LOW);
digitalWrite(gelb_pkw, HIGH);
zustand = 1;
}

if(zustand == 1 && currentMillis - previousMillis >= interval2){
  previousMillis = currentMillis;
  digitalWrite(gelb_pkw, LOW);
  digitalWrite(rot_pkw, HIGH);

  zustand = 2;
}

if (zustand == 2 && currentMillis - previousMillis >= interval3){ 
previousMillis = currentMillis;

if(tasterstate){
digitalWrite(rot_f, LOW);
digitalWrite(gruen_f, HIGH);

tasterstate = false;
zustand = 4;
}

else{
  digitalWrite(gelb_pkw, HIGH);
  zustand = 3;
  }
}

if (zustand == 4 && currentMillis - previousMillis >= interval5){
  previousMillis = currentMillis;
  digitalWrite(gruen_f, LOW);
  digitalWrite(rot_f, HIGH);
  digitalWrite(gelb_pkw, HIGH);
  zustand = 3;
}

if(zustand == 3 && currentMillis - previousMillis >= interval4){
previousMillis = currentMillis;
digitalWrite(rot_pkw, LOW);
digitalWrite(gelb_pkw, LOW);
digitalWrite(gruen_pkw, HIGH);

zustand = 0;
}


  /*
  digitalWrite (gruen_pkw, HIGH);
  delay (5000);
  digitalWrite (gruen_pkw, LOW);
  digitalWrite(gelb_pkw, HIGH);
  delay(1000);
  digitalWrite(gelb_pkw, LOW);
  digitalWrite(rot_pkw, HIGH);
  delay (4000);
digitalWrite(gelb_pkw, HIGH);
delay (1000);
digitalWrite(rot_pkw, LOW);
digitalWrite(gelb_pkw, LOW);
*/
}