#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

byte kriper[2][8] =
{
  {
    0b00000,
    0b01110,
    0b01110,
    0b00100,
    0b00100,
    0b00100,
    0b01010,
    0b01010
  },
  {
    0b00000,
    0b00000,
    0b01110,
    0b01110,
    0b00100,
    0b00100,
    0b01010,
    0b10001
  }
};

int px,py;

void setup()
{
  pinMode(A0,INPUT);
  pinMode(A1,INPUT);
  pinMode(A2,INPUT);
  pinMode(A3,INPUT);

  lcd.createChar(0,kriper[0]);
  lcd.createChar(1,kriper[1]);


  lcd.begin(16, 2);
  Serial.begin(9600);

  px = 0; py = 0;
}

void loop()
{

  if(digitalRead(A0) == 1 && px>0)
  {
    px--;
    draw(px,py);
  }
  if(digitalRead(A1) == 1)py = 1;

  if(digitalRead(A3) == 1 && px <= 15)
  {
    draw(px,py);
    px++;
  }
  if(digitalRead(A2) == 1)py = 0;

  Serial.print("X: ");Serial.print(px);Serial.print("Y: ");Serial.println(py);
  draw(px,py);

}

void draw(int x, int y)
{
   lcd.setCursor(x,y);
   lcd.write(byte(0));
}