// Include necessary libraries
#include <Wire.h> // For I2C communication with LCD
#include <LiquidCrystal_I2C.h> // For controlling LCD
#include <SPI.h> // For SPI communication with PIR sensor

// Define pins for buttons and PIR sensor
#define BUTTON1 9
#define BUTTON2 2 
#define PIR_SENSOR A1

// Define LCD address and dimensions
#define LCD_ADDRESS 0x27
#define LCD_COLUMNS 16
#define LCD_ROWS 2

// Initialize LCD object with address and dimensions
LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS);

// Define variables for game state and score
bool gameStarted = false;
int score = 0;

void setup() {
  // Set button pins as inputs
  pinMode(BUTTON1, INPUT_PULLUP);
  pinMode(BUTTON2, INPUT_PULLUP);

  // Initialize LCD and print starting message
  lcd.init();
  lcd.backlight();
  lcd.print("Press button 1");

  // Initialize PIR sensor
  SPI.begin();
  pinMode(PIR_SENSOR, INPUT);
}

void loop() {
  // Check if button 1 is pressed to start game
  if (digitalRead(BUTTON1) == LOW) {
    // Set game state to true and print starting message
    gameStarted = true;
    lcd.clear();
    lcd.print("Starting game...");

    // Wait for 5 seconds
    delay(2000);

    // Clear LCD and print score message
    lcd.clear();
    lcd.print("Score = ");
  }

  // Check if game is started
  if (gameStarted) {
    // Check if PIR sensor detects motion
    if (digitalRead(PIR_SENSOR) == HIGH) {
      // Increase score by 1 and print updated score
      score++;
      lcd.setCursor(8, 0);
      lcd.print(score);
      delay(3000);
    }
  }

  // Check if button 2 is pressed to end game
  if (digitalRead(BUTTON2) == LOW) {
    // Set game state to false and print game over message
    gameStarted = false;
    lcd.clear();
    lcd.print("Game over.");

     delay(2000);

    // Clear LCD and print score message
    lcd.clear();
    lcd.print("Press Button 1");
    score = 0;
  }
}