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

// Inisialisasi LCD 20x4 dengan alamat 0x27
LiquidCrystal_I2C lcd(0x27, 20, 4);

const int ledPin = 13; // pin LED (bisa pakai LED built-in)

void animateText(const char* text, int row, int speed = 100, bool clearBefore = false) {
  if (clearBefore) lcd.clear();
  lcd.setCursor(0, row);

  for (int i = 0; text[i] != '\0'; i++) {
    lcd.print(text[i]);

    // LED berkedip setiap huruf
    digitalWrite(ledPin, HIGH);
    delay(speed / 2);
    digitalWrite(ledPin, LOW);
    delay(speed / 2);
  }
}

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // === Lirik 1 ===
  lcd.clear();
  animateText("Ku merasakan apa", 0, 90, false);
  lcd.setCursor(0, 1);
  animateText("yang kau rasakan", 1, 90, false);
  delay(1500);

  // === Lirik 2 ===
  lcd.clear();
  animateText("Tanpa ragu ku bilang", 0, 70, false);
  lcd.setCursor(0, 1);
  animateText("kamu yang paling", 1, 70, false);
  lcd.setCursor(0, 2);
  animateText("paham aku", 2, 70, false);
  delay(2000);

  // === Lirik 3 ===
  lcd.clear();
  animateText("Dua jadi satu", 0, 90, false);
  lcd.setCursor(0, 1);
  animateText("belah hati aku", 1, 90, false);
  delay(2000);

  // === Lirik 4 ===
  lcd.clear();
  animateText("Aku mau maju", 0, 80, false);
  lcd.setCursor(0, 1);
  animateText("tapi tinggal tunggu", 1, 80, false);
  lcd.setCursor(0, 2);
  animateText("waktu", 2, 80, false);
  delay(3000);

  // Ulangi lagu
}