#include <LCD_I2C.h>
LCD_I2C lcd(0x27,16,2);

const int button1 = 8;
const int button2 = 2;
const int button3 = 12;
const int button4 = 13;

int button1State = 0;
int button2State = 0;
int button3State = 0;
int button4State = 0;

int lastButton1 = 0;
int lastButton2 = 0;
int lastButton3 = 0;
int lastButton4 = 0;

int x = 0;
int y = 0;

void setup() {
  lcd.begin();
  lcd.backlight();

  pinMode(button1, INPUT_PULLUP);
  pinMode(button2, INPUT_PULLUP);
  pinMode(button3, INPUT_PULLUP);
  pinMode(button4, INPUT_PULLUP);

  lcd.setCursor(x, y);
  lcd.print("x");
}

void loop() {
  button1State = digitalRead(button1);
  if (button1State == LOW && lastButton1 == HIGH) {
    if (x < 15) x++;
    lcd.clear();
    lcd.setCursor(x, y);
    lcd.print("x");
    delay(300);
  }
  lastButton1 = button1State;

  button2State = digitalRead(button2);
  if (button2State == LOW && lastButton2 == HIGH) {
    if (y < 1) y++;
    lcd.clear();
    lcd.setCursor(x, y);
    lcd.print("x");
    delay(300);
  }
  lastButton2 = button2State;

  button3State = digitalRead(button3);
  if (button3State == LOW && lastButton3 == HIGH) {
    if (y > 0) y--;
    lcd.clear();
    lcd.setCursor(x, y);
    lcd.print("x");
    delay(300);
  }
  lastButton3 = button3State;

  button4State = digitalRead(button4);
  if (button4State == LOW && lastButton4 == HIGH) {
    if (x > 0) x--;
    lcd.clear();
    lcd.setCursor(x, y);
    lcd.print("x");
    delay(300);
  }
  lastButton4 = button4State;
}