#include <LiquidCrystal.h>
LiquidCrystal lcd(9, 8, 7, 6, 5, 4);

// Karakter baris atas
byte topChars[2][3][8] = {
  { // Baris atas 1
    { B11111, B11111, B11100, B11011, B11011, B10111, B10111, B10110 },
    { B11000, B00111, B11111, B11000, B11010, B11010, B00010, B11110 },
    { B00000, B11111, B11111, B10001, B10101, B10001, B11111, B10001 }
  },
  { // Baris atas 2
    { B00000, B11111, B11111, B00011, B01011, B01011, B01000, B01111 },
    { B00011, B11100, B11111, B11000, B11010, B11000, B11111, B01000 },
    { B11111, B11111, B00111, B11011, B11011, B11101, B11101, B11101 }
  }
};

// Karakter baris bawah
byte bottomChars[2][3][8] = {
  { // Baris bawah 1
    { B10110, B10110, B10110, B11011, B11011, B11100, B11111, B11111 },
    { B10010, B10010, B11110, B00001, B11111, B11111, B00111, B11000 },
    { B10101, B10101, B10101, B10001, B11111, B11111, B11111, B00000 }
  },
  { // Baris bawah 2
    { B01001, B01001, B01111, B10000, B11111, B11111, B11111, B00000 },
    { B01010, B01010, B01010, B11000, B11111, B11111, B11100, B00011 },
    { B11101, B11101, B11101, B11011, B11011, B00111, B11111, B11111 }
  }
};

unsigned long lastSwitch = 0;
bool showFirstSet = true;

unsigned long startTime;

void setup() {
  lcd.begin(16, 2);

  unsigned long startTime = millis();
  bool state = true;

  while (millis() - startTime < 5000) {
    showFirstSet = state;
    displayCharacters();
    delay(200); // Tampilkan selama 1 detik
    state = !state; // Ganti tampilan
  }
}

void loop() {
  if (millis() - lastSwitch >= 100) {
    showFirstSet = !showFirstSet;
    lastSwitch = millis();
    displayCharacters();
  }
}

void displayCharacters() {
  int setIndex = showFirstSet ? 0 : 1;

  // Buat karakter atas (slot 0–2)
  for (int i = 0; i < 3; i++) {
    lcd.createChar(i, topChars[setIndex][i]);
  }

  // Buat karakter bawah (slot 3–5)
  for (int i = 0; i < 3; i++) {
    lcd.createChar(i + 3, bottomChars[setIndex][i]);
  }

  int colStart = showFirstSet ? 0 : 3; // kolom awal penulisan (ubah ke 4)

  // Hapus karakter sebelumnya di kolom yang tidak digunakan saat ini
  int clearStart = showFirstSet ? 3 : 0; // lokasi yang akan dibersihkan
  for (int row = 0; row < 2; row++) {
    lcd.setCursor(clearStart, row);
    for (int i = 0; i < 3; i++) {
      lcd.write(255); // blok penuh
    }
  }

  // Tampilkan baris atas
  lcd.setCursor(colStart, 0);
  for (int i = 0; i < 3; i++) {
    lcd.write(i);  // menulis karakter 0–2
  }

  // Tampilkan baris bawah
  lcd.setCursor(colStart, 1);
  for (int i = 3; i < 6; i++) {
    lcd.write(i);  // menulis karakter 3–5
  }

  // Tambahkan teks "Battery" dan "Monitor" di posisi tetap
  lcd.setCursor(7, 0);
  lcd.print("Battery");

  lcd.setCursor(7, 1);
  lcd.print("Monitor");
}