// Define LED pins for each direction
const int eastRedPin = 4;
const int eastYellowPin = 3;
const int eastGreenPin = 2;

const int southRedPin = 7;
const int southYellowPin = 6;
const int southGreenPin = 5;

const int westRedPin = 10;
const int westYellowPin = 9;
const int westGreenPin = 8;

const int northRedPin = 13;
const int northYellowPin = 12;
const int northGreenPin = 11;

// Timing constants (in milliseconds)
const int greenDuration = 5000;  // Duration for green light
const int yellowDuration = 2000; // Duration for yellow light

void setup() {
  // Initialize all pins as OUTPUT
  pinMode(northRedPin, OUTPUT);
  pinMode(northYellowPin, OUTPUT);
  pinMode(northGreenPin, OUTPUT);
  
  pinMode(southRedPin, OUTPUT);
  pinMode(southYellowPin, OUTPUT);
  pinMode(southGreenPin, OUTPUT);
  
  pinMode(westRedPin, OUTPUT);
  pinMode(westYellowPin, OUTPUT);
  pinMode(westGreenPin, OUTPUT);
  
  pinMode(eastRedPin, OUTPUT);
  pinMode(eastYellowPin, OUTPUT);
  pinMode(eastGreenPin, OUTPUT);
}

void loop() {
  // North Yellow, South, West, East Red
  setLights(LOW, HIGH, LOW,  // North Yellow
            LOW, LOW, HIGH,  // South Red
            LOW, LOW, HIGH,  // West Red
            LOW, LOW, HIGH); // East Red
  delay(yellowDuration);

  // North Green, South, West, East Red
  setLights(HIGH, LOW, LOW,  // North Green
            LOW, LOW, HIGH,  // South Red
            LOW, LOW, HIGH,  // West Red
            LOW, LOW, HIGH); // East Red
  delay(greenDuration);

  
// South Yellow, North, West, East Red
  setLights(LOW, LOW, HIGH,  // North Red
            LOW, HIGH, LOW,  // South Yellow
            LOW, LOW, HIGH,  // West Red
            LOW, LOW, HIGH); // East Red
  delay(yellowDuration);

  // South Green, North, West, East Red
  setLights(LOW, LOW, HIGH,  // North Red
            HIGH, LOW, LOW,  // South Green
            LOW, LOW, HIGH,  // West Red
            LOW, LOW, HIGH); // East Red
  delay(greenDuration);

  // West Yellow, North, South, East Red
  setLights(LOW, LOW, HIGH,  // North Red
            LOW, LOW, HIGH,  // South Red
            LOW, HIGH, LOW,  // West Yellow
            LOW, LOW, HIGH); // East Red
  delay(yellowDuration);

  // West Green, North, South, East Red
  setLights(LOW, LOW, HIGH,  // North Red
            LOW, LOW, HIGH,  // South Red
            HIGH, LOW, LOW,  // West Green
            LOW, LOW, HIGH); // East Red
  delay(greenDuration);

  // East Yellow, North, South, West Red
  setLights(LOW, LOW, HIGH,  // North Red
            LOW, LOW, HIGH,  // South Red
            LOW, LOW, HIGH,  // West Red
            LOW, HIGH, LOW); // East Yellow
  delay(yellowDuration);

  // East Green, North, South, West Red
  setLights(LOW, LOW, HIGH,  // North Red
            LOW, LOW, HIGH,  // South Red
            LOW, LOW, HIGH,  // West Red
            HIGH, LOW, LOW); // East Green
  delay(greenDuration);

  
}

void setLights(int northGreen, int northYellow, int northRed,
               int southGreen, int southYellow, int southRed,
               int westGreen, int westYellow, int westRed,
               int eastGreen, int eastYellow, int eastRed) {
  // Set North direction lights
  digitalWrite(northGreenPin, northGreen);
  digitalWrite(northYellowPin, northYellow);
  digitalWrite(northRedPin, northRed);

  // Set South direction lights
  digitalWrite(southGreenPin, southGreen);
  digitalWrite(southYellowPin, southYellow);
  digitalWrite(southRedPin, southRed);

  // Set West direction lights
  digitalWrite(westGreenPin, westGreen);
  digitalWrite(westYellowPin, westYellow);
  digitalWrite(westRedPin, westRed);

  // Set East direction lights
  digitalWrite(eastGreenPin, eastGreen);
  digitalWrite(eastYellowPin, eastYellow);
  digitalWrite(eastRedPin, eastRed);
}