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

const byte rows = 4;
const byte cols = 4;

char key[rows][cols] = {
    {'1', '2', '3', 'A'},
    {'4', '5', '6', 'B'},
    {'7', '8', '9', 'C'},
    {'*', '0', '#', 'D'}
};
byte rowPins[rows] = {9, 8, 7, 6};
byte colPins[cols] = {5, 4, 3, 2};
Keypad keypad = Keypad(makeKeymap(key), rowPins, colPins, rows, cols);


int x=0;
int y=0;
void setup() {
  Serial.begin(9600);
  Serial.println(x);
  lcd.init();
  lcd.clear();         
  lcd.backlight();      // Make sure backlight is on
  // Print a message on both lines of the LCD.
}
void loop() {
char keyPressed = keypad.getKey();
    if (keyPressed >0 && keyPressed != 'D') {
      lcd.setCursor(x,y);
      lcd.print(keyPressed);
      x=x+1;
      Serial.println(x);
    }
    if (keyPressed=='D'){
      x=x-1;
      lcd.setCursor(x,y);
      lcd.print(" ");
      Serial.println(x);
    }
    
}