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

LiquidCrystal_I2C lcd(0x27, 16, 2);

const char* lyrics[] = {
  "Sudah", "terbiasa", "terjadi", "tante",
  "Teman", "datang", "ketika", "lagi",
  "butuh", "saja", "Coba", "kalo",
  "lagi", "susah", "Mereka", "semua",
  "Menghilaaangg^_^"
};

const int delays[] = {
  500, 500, 500, 1000,
  500, 500, 500, 400,
  500, 1000, 500, 500,
  500, 1000, 500, 500,
  6000
};

const int wordCount = sizeof(lyrics) / sizeof(lyrics[0]);
int typingDelay = 200;

const char* promoPairs[] = {
  "", "Apakah", "spek standar",
  "seperti ini", "yang para", "pemirsa inginkan?"
};
const int promoPairCount = sizeof(promoPairs) / sizeof(promoPairs[0]);
const int promoDisplayInterval = 2; 

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.clear();
  Serial.begin(9600);
}

void loop() {
  for (int i = 0; i < wordCount; i++) {
    int row = i % 2;
    lcd.setCursor(0, row);
    lcd.print("                "); 

    if (i == wordCount - 1) {
      const char* word = lyrics[i];
      int len = strlen(word);

      int totalSteps = promoPairCount * promoDisplayInterval;
      if (totalSteps < len) totalSteps = len;

      for (int j = 0; j <= totalSteps; j++) {
        lcd.setCursor(0, row);
        lcd.print("                ");
        lcd.setCursor(0, row);
        for (int k = 0; k < j && k < len; k++) {
          lcd.print(word[k]);
        }

        int promoIndex = j / promoDisplayInterval;
        if (promoIndex < promoPairCount) {
          lcd.setCursor(0, 1);
          lcd.print("                "); 
          lcd.setCursor(0, 1);
          lcd.print(promoPairs[promoIndex]);
        }

        delay(typingDelay);
      }

      delay(delays[i]); 
    } else {
      const char* word = lyrics[i];
      int startPos = (16 - strlen(word)) / 2;
      if (startPos < 0) startPos = 0;
      lcd.setCursor(startPos, row);
      lcd.print(word);
      delay(delays[i]);
    }

    if (row == 1 || i == wordCount - 1) {
      delay(300);
      lcd.clear();
    }
  }

  while (true); 
}