#include <LiquidCrystal.h>
LiquidCrystal lcd(11,9,5,4,3,2);

int posX = 0;
int posY = 0;

int posA = 0;
int posB = 0;
char luka[4][20];

int l = 0;

void setup() 
{
  lcd.begin(20,4);
  pinMode(A0, INPUT);
  digitalWrite(A0, HIGH);
  pinMode(A1, INPUT);
  digitalWrite(A1, HIGH);
  pinMode(A2, INPUT);
  digitalWrite(A2, HIGH);
  pinMode(A3, INPUT);
  digitalWrite(A3, HIGH);
  Serial.begin(9600);

  for(int i=0; i<4; i++)
  {
    for(int j=0; j<20; j++)
      luka[i][j] = ' ';
  }
  randomSeed(analogRead(A5));
  posA = random(0,4);
  posB = random(0,20);
  luka[posA][posB] = '0';
}

void loop() 
{
  for(int i=0; i<4; i++)
  {
    for(int j=0; j<20; j++)
    {
      lcd.setCursor(j,i);
      lcd.print(luka[i][j]);
    }
  }
 // lcd.clear();
  lcd.setCursor(posX,posY);
  lcd.print("X");
  //Serial.println(posX);
  //Serial.println(posY);
  delay(100);

  if(digitalRead(A2) == LOW)
  {
    if(posY>0)
      posY--;
  }
  else if(digitalRead(A0) == LOW)
  {
    if(posY<3)
      posY++;
  }
  else if(digitalRead(A1) == LOW)
  {
    if(posX>0)
      posX--;
  }
  else if(digitalRead(A3) == LOW)
  {
    if(posX <19)
      posX++;
  }
  
  if( posA == posY && posB == posX)
  {
    luka[posA][posB] = ' ';
    posA = random(0,4);
    posB = random(0,20);
    luka[posA][posB] = '0';
    
    l ++; 
   Serial.println(l);
  }

}