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

int button1=2;
int button2=3;
int button3=4;
int button4=5;
int sttspb1=0;
int sttspb2=0;
int sttspb3=0;
int sttspb4=0;

int counter = 0;
const int maxCounterValue = 24;
void setup() {
  lcd.init();
  lcd.backlight ();
  pinMode (button1, INPUT);
  pinMode(button2, INPUT);
  pinMode(button3, INPUT);
  pinMode(button4, INPUT);
  
  lcd.setCursor(0,0);
  lcd.print ("Reifani Anistya");
  lcd.setCursor(0,1);
  lcd.print("18 juni 2008");
  delay (1500);
  lcd.setCursor(0, 1);
  lcd.print("Counter:");
  lcd.print(counter);
  lcd.print("   ");
}

 void loop() {
  if (digitalRead(button1) == HIGH) {
    if (counter < 24) {
      counter++;
      updateCounter();
    }
    delay(200); 
  }
  
  if (digitalRead(button2) ==HIGH) {
    if (counter > 0) {
      counter--;
      updateCounter();
    }
    delay(200);
  }
  
  if (digitalRead(button3) == HIGH) {
    for (counter = 0;counter <= 24; counter++) {
      updateCounter();
      delay(1000);
    }
    delay(200); 
  }
  
  if (digitalRead(button4) == HIGH) {
    for (counter = 24; counter >= 0; counter--) {
      updateCounter();
      delay(1000);
    }
    delay(200);
  }
 }

void updateCounter() {
  lcd.setCursor(8, 1);
  lcd.print(counter);
  lcd.print("   ");
}