int Player_x = 50;
int Player_y = 50;
int counter = 10;
int direction = 0;
int dleft = 10;
int dright = 20;
int dup = 30;
int ddown = 40;
int snakecounter = 1;
int dx = 0;
int dy = 0;

int X = 0;
int Y = 0;

int [] snakeX = new int[100];
int [] snakeY = new int[100];
int field_x =  (int)random(0, 10);
int field_y =  (int)random(0, 10);

void generate_fruit()
{
  field_x = (int)random(0, 10);
  field_y = (int)random(0, 10);
}

void set_table()
{

  background(0, 0, 0);
  for (int i = 0 ; i < 10; i++)
  {
    for (int j = 0 ; j < 10; j++)
    {
      if (!(field_x == i && field_y == j)) {

        fill(255, 255, 255);
        rect(i*50, j*50, 50, 50);
      }
      else
      {
        fill(0, 0, 255);
        rect(i*50, j*50, 50, 50);
      }

      if (i*50 == Player_x && j*50 == Player_y && field_x == i && field_y == j) {
        snakecounter++;
        generate_fruit();

      }
    }
  }
}

void setup()
{

size(700, 700);
set_table();
}

void draw()
{

set_table();

snakeX[snakecounter - 1] = Player_x;
snakeY[snakecounter - 1] = Player_y;

for (int i = 0; i < snakecounter - 1; i++)
{
if (snakecounter > 1){
if (direction == dleft) snakeX[snakecounter - 1] +=50;
if (direction == dright) snakeX[snakecounter - 1] -=50;

if (direction == dup) snakeY[snakecounter - 1] += 50;
if (direction == ddown) snakeY[snakecounter-1] -= 50;
fill(122,122,122);
rect(snakeX[snakecounter - 1], snakeY[snakecounter -1], 50, 50);

}

}

fill(255, 0, 0);
rect(Player_x, Player_y, 50, 50);

}

void keyPressed() {
  if (keyCode == UP && Player_y > 0) 
  {
    direction = dup;
    Player_y -= 50;
  }
  if (keyCode == DOWN && Player_y < 450) 
  {
    direction = ddown;
    Player_y += 50;
  } 

  if (keyCode == LEFT && Player_x > 0) 
  {
    direction = dleft;
    Player_x -= 50; 
  }

  if (keyCode == RIGHT  && Player_x <450) 
  {
    direction = dright;
    Player_x += 50; 
  }
}