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

// Set the LCD address to 0x27 or 0x3F for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Define the RGB LED pins
const int redPin = 9;
const int greenPin = 10;
const int bluePin = 11;

// Time duration in seconds
const int redTime = 10;
const int greenTime = 7;
const int yellowTime = 3;

void setup() {
  // Initialize the LCD
  lcd.init();
  lcd.backlight();

  // Initialize the RGB LED pins
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // Red light
  setColor(255, 0, 0); // Red
  countdown(redTime);

  // Green light
  setColor(0, 255, 0); // Green
  countdown(greenTime);

  // Yellow light
  setColor(255, 255, 0); // Yellow (Red + Green)
  countdown(yellowTime);
}

void setColor(int red, int green, int blue) {
  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);
}

void countdown(int seconds) {
  for (int i = seconds; i > 0; i--) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Time Left: ");
    lcd.print(i);
    lcd.print(" sec");
    delay(1000);
  }
}