//Traffic Light 1 
  int green1 = 11;		
  int yellow1 = 10;    
  int red1 = 9;    
//Traffic Light 2
  int green2 = 7;		  
  int yellow2 = 6;    
  int red2 = 5;    
//Pin Buttons
  int PinButton[] = {4,8};
  int buttons[] = {0,0};

  int currentState = 0;
  
  unsigned long start = 0;
  unsigned long gNrDelay = 6000; 
  unsigned long yDelay = 3500; 

  void setup() {
    pinMode (green1, OUTPUT);
      pinMode (yellow1, OUTPUT);
      pinMode (red1, OUTPUT);

      pinMode (green2, OUTPUT);		
      pinMode (yellow2, OUTPUT);
      pinMode (red2, OUTPUT);

      pinMode (PinButton[0], INPUT);
      pinMode (PinButton[1], INPUT);
      Serial.begin(9600);
      start = millis();
  }

  void loop() {
    buttons[0] = digitalRead(PinButton[0]);
    buttons[1] = digitalRead(PinButton[1]);
    
    Traffic();
    
    if(buttons[0]==HIGH){
      currentState = 0 ;

      TrafficLight();
    }
    else if(buttons[1]==HIGH){
      currentState = 2;
      TrafficLight();
    }
  }

  void Traffic() {
  unsigned long currentTime = millis();
  unsigned long elapsedTime = currentTime - start;

  if (currentState == 0) {
    if (elapsedTime < gNrDelay) {
      digitalWrite(green1, HIGH);
      digitalWrite(yellow1, LOW);
      digitalWrite(red1, LOW);

      digitalWrite(green2, LOW);
      digitalWrite(yellow2, LOW);
      digitalWrite(red2, HIGH);
    } else {
      currentState = 1;
      start = currentTime;
    }
  } else if (currentState == 1) {
    if (elapsedTime < yDelay) {
      digitalWrite(green1, LOW);
      digitalWrite(yellow1, HIGH);
      digitalWrite(red1, LOW);

      digitalWrite(green2, LOW);
      digitalWrite(yellow2, LOW);
      digitalWrite(red2, HIGH);
    } else {
      currentState = 2;
      start = currentTime;
    }
  } else if (currentState == 2) {
    if (elapsedTime < gNrDelay) {
      digitalWrite(green1, LOW);
      digitalWrite(yellow1, LOW);
      digitalWrite(red1, HIGH);

      digitalWrite(green2, HIGH);
      digitalWrite(yellow2, LOW);
      digitalWrite(red2, LOW);
    } else {
      currentState = 3;
      start = currentTime;
    }
  } else if (currentState == 3) {
    if (elapsedTime < yDelay) {
      digitalWrite(green1, LOW);
      digitalWrite(yellow1, LOW);
      digitalWrite(red1, HIGH);

      digitalWrite(green2, LOW);
      digitalWrite(yellow2, HIGH);
      digitalWrite(red2, LOW);
    } else {
      currentState = 0;
      start = currentTime;
    }
  } 
}

  void TrafficLight() {
  unsigned long currentTime1 = millis();
  unsigned long elapsedTime1 = currentTime1 - start;

  if (currentState == 0) {
    if (elapsedTime1 < gNrDelay) {
      digitalWrite(green1, HIGH);
      digitalWrite(yellow1, LOW);
      digitalWrite(red1, LOW);

      digitalWrite(green2, LOW);
      digitalWrite(yellow2, HIGH);
      delay(500);
      digitalWrite(red2, HIGH);
    } else {
      currentState = 1;
      start = currentTime1;
    }
  } else if (currentState == 1) {
    if (elapsedTime1 < yDelay) {
      digitalWrite(green1, LOW);
      digitalWrite(yellow1, HIGH);
      digitalWrite(red1, LOW);

      digitalWrite(green2, LOW);
      digitalWrite(yellow2, LOW);
      digitalWrite(red2, HIGH);
    } else {
      currentState = 2;
      start = currentTime1;
    }
  } else if (currentState == 2) {
    if (elapsedTime1 < gNrDelay) {
      digitalWrite(green1, LOW);
      digitalWrite(yellow1, HIGH);
      delay(500);
      digitalWrite(red1, HIGH);

      digitalWrite(yellow2, LOW);
      digitalWrite(green2, HIGH);
      digitalWrite(red2, LOW);
    } else {
      currentState = 3;
      start = currentTime1;
    }
  } else if (currentState == 3) {
    if (elapsedTime1 < yDelay) {
      digitalWrite(green1, LOW);
      digitalWrite(yellow1, LOW);
      digitalWrite(red1, HIGH);

      digitalWrite(green2, LOW);
      digitalWrite(yellow2, HIGH);
      digitalWrite(red2, LOW);
    } else {
      currentState = 0;
      start = currentTime1;
    }
  } 
}