//Jared Jacob G. Pol
//Benedict Calbes
//Activity 5 
//Intersection Traffic Light


// Define the durations for each phase
const int redDuration = 3000;
const int yellowDuration = 1000;
const int greenDuration = 3000;

// Define the current phase
enum TrafficPhase { RED, YELLOW, GREEN };
TrafficPhase currentPhase = RED;

void setup() {
  // Set pin modes
  
  pinMode(2, OUTPUT); // North road red
  pinMode(3, OUTPUT); // North road yellow
  pinMode(4, OUTPUT); // North road green
  pinMode(5, OUTPUT); // South road red
  pinMode(6, OUTPUT); // South road yellow
  pinMode(7, OUTPUT); // South road green
  pinMode(8, OUTPUT); // West road red
  pinMode(9, OUTPUT); // West road yellow
  pinMode(10, OUTPUT); // West road green
  pinMode(11, OUTPUT); // East road red
  pinMode(12, OUTPUT); // East road yellow
  pinMode(13, OUTPUT); // East road green

  // Initialize lights
  northSouthGreen(); // Initially, let North and South have green lights
  eastWestRed(); // Initially, let East and West have red lights

  
}

void loop() {
  // Timing logic
  if (currentPhase == RED) {
    delay(redDuration);
    currentPhase = YELLOW;
  } else if (currentPhase == YELLOW) {
    delay(yellowDuration);
    currentPhase = GREEN;
  } else if (currentPhase == GREEN) {
    delay(greenDuration);
    currentPhase = RED;
  }

  // Control traffic lights based on the current phase
  if (currentPhase == RED) {
    eastWestRed();
    
    eastWestRede();
  
  

    northSouthRede();
  

   
  } else if (currentPhase == YELLOW) {
    northSouthYellow();
    eastWestYellow();
  } else if (currentPhase == GREEN) {
    northSouthGreen();
  eastWestGreen();

    northSouthRed();
     eastWestGreene();
  }
}

// Functions to control traffic lights for North and South roads
void northSouthRed() {
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
}

void northSouthYellow() {
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  digitalWrite(6, HIGH);
  digitalWrite(7, LOW);
}

void northSouthGreen() {
  digitalWrite(2, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, HIGH);
}

void northSouthRede() {
  digitalWrite(2, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
}


// Functions to control traffic lights for East and West roads
void eastWestRed() {
  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
  digitalWrite(11, HIGH);
  digitalWrite(12, LOW);
  digitalWrite(13, LOW);
}

void eastWestYellow() {
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
  digitalWrite(11, LOW);
  digitalWrite(12, HIGH);
  digitalWrite(13, LOW);
}
void eastWestGreene() {
  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
  digitalWrite(11, HIGH);
  digitalWrite(12, LOW);
  digitalWrite(13, LOW);
}

void eastWestRede() {
  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
  digitalWrite(11, LOW);
  digitalWrite(12, LOW);
  digitalWrite(13, HIGH);
}

void eastWestGreen() {
  digitalWrite(8, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
  digitalWrite(11, HIGH);
  digitalWrite(12, LOW);
  digitalWrite(13, LOW);
}