#include <LiquidCrystal_I2C.h>

#define LCD_ADDR 0x27
#define LCD_COLUMNS 16
#define LCD_ROWS 2

LiquidCrystal_I2C lcd(LCD_ADDR, LCD_COLUMNS, LCD_ROWS);
const int buttonPins[] = {8, 9, 10, 11}; 
const int ledPins[] = {2, 3, 4, 5};      
int currentLED;
float startTime;
float timeTaken;
int score=0;
void setup() {
  lcd.init();    
  lcd.backlight(); 

  for (int i = 0; i < 4; i++)
    pinMode(buttonPins[i], INPUT_PULLUP);


  for (int i = 0; i < 4; i++)
    pinMode(ledPins[i], OUTPUT);

  randomSeed(analogRead(0)); // Seed the random number generator
}

void loop() {
  currentLED = random(0, 4);     
  digitalWrite(ledPins[currentLED], HIGH); // Turn on the selected LED
  startTime = millis();          

  while (true) {
    // Check if any button is pressed
    for (int i = 0; i < 4; i++) {
      if (digitalRead(buttonPins[i]) == LOW) {
        timeTaken = millis() - startTime; 
        digitalWrite(ledPins[currentLED], LOW);

        lcd.clear(); // Clear the LCD screen
        lcd.setCursor(0, 0);
        lcd.print("Time taken: ");
        lcd.print(timeTaken / 1000); 
        lcd.print("s");
        lcd.print("score: ");

        if (i == currentLED){
           lcd.setCursor(0, 1);
           score++;
          lcd.print("score:");
          lcd.print(score);
          }
          else
          { 
             lcd.setCursor(0, 1);
            lcd.print("game over");
            score=0;

            }


        delay(700);
        return;
      }
    }
  }
}