const int resetPin = 2; // Button connected to pin 2 (for manual reset)

// Define the LED pins for the traffic lights
const int greenPin_NordSouth = 2;  // Green light
const int orangePin_NordSouth = 3; // Orange light
const int redPin_NordSouth = 4;    // Red light

const int greenPin_EstWest = 5;  // Green light
const int orangePin_EstWest = 6; // Orange light
const int redPin_EstWest = 7;    // Red light

// Time durations for each light in milliseconds
const unsigned long greenDuration = 3000;  // 160 seconds in milliseconds (180,000 ms)
const unsigned long orangeDuration = 1000;  // 20 seconds in milliseconds (20,000 ms)
const unsigned long redDuration1 = 3001;    // 160 seconds in milliseconds (124,000 ms)
const unsigned long redDuration2 = 1001;    // 20 seconds in milliseconds (124,000 ms)

// Timing counter
unsigned long previousMillis = 0;
unsigned long lightCycleDuration = 0; // This variable will control the timing for each light

void setup() {
  // Set the LED pins as outputs
  pinMode(greenPin_NordSouth, OUTPUT);
  pinMode(orangePin_NordSouth, OUTPUT);
  pinMode(redPin_NordSouth, OUTPUT);

  pinMode(greenPin_EstWest, OUTPUT);
  pinMode(orangePin_EstWest, OUTPUT);
  pinMode(redPin_EstWest, OUTPUT);

  // Start with the green light on
  digitalWrite(greenPin_NordSouth, HIGH); // Turn on Green light
  digitalWrite(orangePin_NordSouth, LOW); // Turn off Orange light
  digitalWrite(redPin_NordSouth, LOW);    // Turn off Red light

  digitalWrite(greenPin_EstWest, HIGH); // Turn on Green light
  digitalWrite(orangePin_EstWest, LOW); // Turn off Orange light
  digitalWrite(redPin_EstWest, LOW);    // Turn off Red light
}

void loop() {
  unsigned long currentMillis = millis();  // Get the current time in milliseconds
  // If the current time exceeds the cycle duration, change the traffic light
  if (currentMillis - previousMillis >= lightCycleDuration) {
    previousMillis = currentMillis;  // Reset the timer for the next light change

    // Cycle through the lights in the following order:

    // 1. Green Light Duration (3 minutes)
    if (lightCycleDuration == 0) {
      digitalWrite(greenPin_NordSouth, HIGH);  // Turn on Green light
      digitalWrite(orangePin_NordSouth, LOW);  // Turn off Orange light
      digitalWrite(redPin_NordSouth, LOW);     // Turn off Red light
      digitalWrite(greenPin_EstWest, LOW);  // Turn off Green light
      digitalWrite(orangePin_EstWest, LOW);  // Turn off Orange light
      digitalWrite(redPin_EstWest, HIGH);     // Turn on Red light
      lightCycleDuration = greenDuration;  // Set the duration for Green light
    }
    // 2. Orange Light Duration (20 seconds)
    else if (lightCycleDuration == greenDuration) {
      digitalWrite(greenPin_NordSouth, LOW);   // Turn off Green light
      digitalWrite(orangePin_NordSouth, HIGH); // Turn on Orange light
      digitalWrite(redPin_NordSouth, LOW);     // Turn off Red light
      digitalWrite(greenPin_EstWest, LOW);  // Turn off Green light
      digitalWrite(orangePin_EstWest, LOW);  // Turn off Orange light
      digitalWrite(redPin_EstWest, HIGH);     // Turn on Red light
      lightCycleDuration = orangeDuration; // Set the duration for Orange light
    }
    // 3. Red Light Duration (2 minutes and 4 seconds)
    else if (lightCycleDuration == orangeDuration) {
      digitalWrite(greenPin_NordSouth, LOW);   // Turn off Green light
      digitalWrite(orangePin_NordSouth, LOW);  // Turn off Orange light
      digitalWrite(redPin_NordSouth, HIGH);    // Turn on Red light
      digitalWrite(greenPin_EstWest, HIGH);  // Turn on Green light
      digitalWrite(orangePin_EstWest, LOW);  // Turn off Orange light
      digitalWrite(redPin_EstWest, LOW);     // Turn off Red light
      lightCycleDuration = redDuration1; // Set the duration for Red light
    }
    // 4. 
    else if (lightCycleDuration == redDuration1) {
      digitalWrite(greenPin_NordSouth, LOW);   // Turn off Green light
      digitalWrite(orangePin_NordSouth, LOW);  // Turn off Orange light
      digitalWrite(redPin_NordSouth, HIGH);    // Turn on Red light
      digitalWrite(greenPin_EstWest, LOW);  // Turn off Green light
      digitalWrite(orangePin_EstWest, HIGH);  // Turn on Orange light
      digitalWrite(redPin_EstWest, LOW);     // Turn off Red light
      lightCycleDuration = redDuration2; // Set the duration for Red light
    }
    // After Red light duration, reset the cycle to start again with Green light
    else if (lightCycleDuration == redDuration2) {
      lightCycleDuration = 0; // Reset the cycle to start with Green light
    }
  }
}