#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16 ,2);

const int buttonPlus = 13;
const int buttonMinus = 12;
const int buttonAwal = 11;
const int buttonAkhir = 10;

int counter = 0;
int mode = 0;

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Wahyu efendi");
  lcd.setCursor(0, 1);
  lcd.print("20 Mei 2007");
  delay(1500);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Wahyu efendi");
  lcd.setCursor(0, 1);
  lcd.print("Counter : 0");
  
  pinMode(buttonPlus, INPUT);
  pinMode(buttonMinus, INPUT);
  pinMode(buttonAwal, INPUT);
  pinMode(buttonAkhir, INPUT);
}

void loop() {
  int SbuttonPlus = digitalRead(buttonPlus);
  int SbuttonMinus = digitalRead(buttonMinus);
  int SbuttonAwal = digitalRead(buttonAwal);
  int SbuttonAkhir = digitalRead(buttonAkhir);

  // Menambah counter jika tombol increment ditekan
  if (SbuttonPlus == HIGH) {
    if (counter < 25) {
      counter++;
      lcd.setCursor(10, 1);
      lcd.print(counter);
      lcd.print("     ");
    }
    delay(200); // Debounce delay
  }

  // Mengurangi counter jika tombol decrement ditekan
  if (SbuttonMinus == HIGH) {
    if (counter > 0) {
      counter--;
      lcd.setCursor(10, 1);
      lcd.print(counter);
      lcd.print("     ");
    }
    delay(200);
  }

  if (SbuttonAwal == HIGH) {
    counter = 0;
    lcd.setCursor(10, 1);
    lcd.print(counter);
    lcd.print("   ");
    mode = 1;
    delay(1000);
  }

  if (SbuttonAkhir == HIGH) {
    counter = 25;
    lcd.setCursor(10, 1);
    lcd.print(counter);
    lcd.print("   ");
    mode = 2;
    delay(1500);
  }

  if (mode == 1) {
    if (counter < 25 ) {
      counter++;
      lcd.setCursor(10, 1);
      lcd.print(counter);
      lcd.print("   ");
      delay(1000);
    }else{
      mode = 0;
    }

  }
  if (mode == 2) {
    if(counter > 0){
      counter--;
      lcd.setCursor(10, 1);
      lcd.print(counter);
      lcd.print("   ");
      delay(1500);
    }else{
      mode = 0;
    }
  }
}