// Define pin numbers for the traffic lights
const int green1Pin = 0;   // Green light for direction 1
const int yellow1Pin = 1;  // Yellow light for direction 1
const int red1Pin = 2;     // Red light for direction 1

const int green2Pin = 10;   // Green light for direction 2
const int yellow2Pin = 9;  // Yellow light for direction 2
const int red2Pin = 8;     // Red light for direction 2

const int green3Pin = 4;    // Green light for direction 3
const int yellow3Pin = 5;   // Yellow light for direction 3
const int red3Pin = 6;      // Red light for direction 3

const int green4Pin = 13;   // Green light for direction 4
const int yellow4Pin = 12;  // Yellow light for direction 4
const int red4Pin = 11;     // Red light for direction 4

void setup() {
  // Set the LED pins as OUTPUT
  pinMode(green1Pin, OUTPUT);
  pinMode(yellow1Pin, OUTPUT);
  pinMode(red1Pin, OUTPUT);

  pinMode(green2Pin, OUTPUT);
  pinMode(yellow2Pin, OUTPUT);
  pinMode(red2Pin, OUTPUT);

  pinMode(green3Pin, OUTPUT);
  pinMode(yellow3Pin, OUTPUT);
  pinMode(red3Pin, OUTPUT);

  pinMode(green4Pin, OUTPUT);
  pinMode(yellow4Pin, OUTPUT);
  pinMode(red4Pin, OUTPUT);

  // Set all lights to red initially
  digitalWrite(red1Pin, HIGH);
  digitalWrite(red2Pin, HIGH);
  digitalWrite(red3Pin, HIGH);
  digitalWrite(red4Pin, HIGH);
  delay(500);
}

void loop() {
  // Traffic light sequence for direction 1
  digitalWrite(red2Pin, HIGH);
  digitalWrite(red3Pin, HIGH);
  digitalWrite(red4Pin, HIGH);
  digitalWrite(red1Pin, LOW);
  digitalWrite(green1Pin, HIGH);
  delay(5000);  // Green light for 5 seconds
  digitalWrite(green1Pin, LOW);

  digitalWrite(red2Pin, HIGH);
  digitalWrite(yellow1Pin, HIGH);
  delay(2000);  // Yellow light for 2 seconds
  digitalWrite(yellow1Pin, LOW);

  // No delay after red1

  // Traffic light sequence for direction 2
  digitalWrite(red1Pin, HIGH);
  digitalWrite(red3Pin, HIGH);
  digitalWrite(red4Pin, HIGH);
  delay(100);
  digitalWrite(red2Pin, LOW);
  digitalWrite(green2Pin, HIGH);
  delay(5000);  // Green light for 5 seconds

  digitalWrite(green2Pin, LOW);
  delay(100);
  digitalWrite(red1Pin, HIGH);
  digitalWrite(yellow2Pin, HIGH);
  delay(2000);  // Yellow light for 2 seconds
  digitalWrite(yellow2Pin, LOW);
  digitalWrite(red1Pin, LOW);

  // No delay after red2

  // Traffic light sequence for direction 3
  digitalWrite(red1Pin, HIGH);
  digitalWrite(red2Pin, HIGH);
  digitalWrite(red4Pin, HIGH);
  delay(100);
  digitalWrite(red3Pin, LOW);
  digitalWrite(green3Pin, HIGH);
  delay(5000);  // Green light for 5 seconds

  digitalWrite(green3Pin, LOW);
  delay(100);
  digitalWrite(red1Pin, HIGH);
  digitalWrite(yellow3Pin, HIGH);
  delay(2000);  // Yellow light for 2 seconds
  digitalWrite(yellow3Pin, LOW);
  digitalWrite(red1Pin, LOW);

  // No delay after red3

  // Traffic light sequence for direction 4
  digitalWrite(red1Pin, HIGH);
  digitalWrite(red2Pin, HIGH);
  digitalWrite(red3Pin, HIGH);
  delay(100);
  digitalWrite(red4Pin, LOW);
  digitalWrite(green4Pin, HIGH);
  delay(5000);  // Green light for 5 seconds

  digitalWrite(green4Pin, LOW);
  delay(100);
  digitalWrite(red1Pin, HIGH);
  digitalWrite(yellow4Pin, HIGH);
  delay(2000);  // Yellow light for 2 seconds
  digitalWrite(yellow4Pin, LOW);
  digitalWrite(red1Pin, LOW);

  // No delay after red4
}