#include <LiquidCrystal_I2C.h>
#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
#define atas    12
#define bawah   11
#define kanan   10
#define kiri    9

void print_tengah(char *s, int baris){
  Serial.print(strlen(s));
  lcd.setCursor((16-strlen(s))/2, baris);
  lcd.print(s);
}

void setup() {
  Serial.begin(115200);
  for(int i = 9; i<=12; i++){
    pinMode(i, INPUT_PULLUP);
  }

  lcd.init();
  lcd.backlight();

  print_tengah("apa ini tengah",0);
  

}

void loop() {
  // put your main code here, to run repeatedly:
  

}