#include <LiquidCrystal_I2C.h>
#include <Wire.h>

// I2C LCD display addresses
const int lcdAddress1 = 0x27; // Replace with the actual I2C address of LCD 1
const int lcdAddress2 = 0x28; // Replace with the actual I2C address of LCD 2
const int lcdAddress3 = 0x29; // Replace with the actual I2C address of LCD 3
const int lcdAddress4 = 0x3c; // Replace with the actual I2C address of LCD 4

// I2C LCD displays
LiquidCrystal_I2C lcd1(lcdAddress1, 16, 2);
LiquidCrystal_I2C lcd2(lcdAddress2, 16, 2);
LiquidCrystal_I2C lcd3(lcdAddress3, 16, 2);
LiquidCrystal_I2C lcd4(lcdAddress4, 16, 2);
 
int signal1[] = {26, 25, 33};
int signal2[] = {19, 18, 5};
int signal3[] = {32, 14, 27};
int signal4[] = {17, 16, 15};

int redDelay = 5000;
int yellowDelay = 2000;

void setup() {
  // Start serial communication
  Serial.begin(9600);
  
  // Initialize the I2C LCD displays
  lcd1.init();
  lcd2.init();
  lcd3.init();
  lcd4.init();

  // Backlight the LCD displays
  lcd1.backlight();
  lcd2.backlight();
  lcd3.backlight();
  lcd4.backlight();

  // Clear the LCD displays
  lcd1.clear();
  lcd2.clear();
  lcd3.clear();
  lcd4.clear();

  // Declaring all the LED's as output
  for (int i = 0; i < 3; i++) {
    pinMode(signal1[i], OUTPUT);
    pinMode(signal2[i], OUTPUT);
    pinMode(signal3[i], OUTPUT);
    pinMode(signal4[i], OUTPUT);
  }

  lcd1.print("Traffic Light 1");
  lcd2.print("Traffic Light 2");
  lcd3.print("Traffic Light 3");
  lcd4.print("Traffic Light 4");
}
void loop() {
  // Making Green  LED at signal 1 and red LED's at other signal HIGH
  digitalWrite(signal1[2], HIGH);
  digitalWrite(signal1[0], LOW);
  digitalWrite(signal2[0], HIGH);
  digitalWrite(signal3[0], HIGH);
  digitalWrite(signal4[0], HIGH);
  delay(redDelay);
  // Making Green LED at signal 1 LOW and making yellow LED at signal 1 HIGH for 2 seconds
  digitalWrite(signal1[1], HIGH);
  digitalWrite(signal1[2], LOW);
  delay(yellowDelay);
  digitalWrite(signal1[1], LOW);
  // Making Green  LED at signal 2 and red LED's at other signal HIGH
  digitalWrite(signal1[0], HIGH);
  digitalWrite(signal2[2], HIGH);
  digitalWrite(signal2[0], LOW);
  digitalWrite(signal3[0], HIGH);
  digitalWrite(signal4[0], HIGH);
  delay(redDelay);
  // Making Green LED at signal 2 LOW and making yellow LED at signal 2 HIGH for 2 seconds
  digitalWrite(signal2[1], HIGH);
  digitalWrite(signal2[2], LOW);
  delay(yellowDelay);
  digitalWrite(signal2[1], LOW);
  // Making Green  LED at signal 3 and red LED's at other signal HIGH
  digitalWrite(signal1[0], HIGH);
  digitalWrite(signal2[0], HIGH);
  digitalWrite(signal3[2], HIGH);
  digitalWrite(signal3[0], LOW);
  digitalWrite(signal4[0], HIGH);
  delay(redDelay);
  // Making Green LED at signal 3 LOW and making yellow LED at signal 3 HIGH for 2 seconds
  digitalWrite(signal3[1], HIGH);
  digitalWrite(signal3[2], LOW);
  delay(yellowDelay);
  digitalWrite(signal3[1], LOW);
  // Making Green  LED at signal 4 and red LED's at other signal HIGH
  digitalWrite(signal1[0], HIGH);
  digitalWrite(signal2[0], HIGH);
  digitalWrite(signal3[0], HIGH);
  digitalWrite(signal4[2], HIGH);
  digitalWrite(signal4[0], LOW);
  delay(redDelay);
  // Making Green LED at signal 4 LOW and making yellow LED at signal 4 HIGH for 2 seconds
  digitalWrite(signal4[1], HIGH);
  digitalWrite(signal4[2], LOW);
  delay(yellowDelay);
  digitalWrite(signal4[1], LOW);
}