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

int button = 12;
int button2 = 11;
int led = 13;

void setup() {
lcd.init();
lcd.clear();
lcd.backlight();

pinMode(button, INPUT_PULLUP);
pinMode(button2, INPUT_PULLUP);
Serial.begin(9600);
}

void loop(){
if (digitalRead(button) == LOW) { 
hitung = hitung +1;
} while(digitalRead(button) == LOW);

if (digitalRead(button2) == LOW) { 
hitung = hitung -1;
} while(digitalRead(button2) == LOW);

lcd.setCursor(0, 0);
lcd.print(hitung);
lcd.println("   ");
delay(50);
}