protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);

            spriteBatch.Begin(SpriteBlendMode.AlphaBlend);

            for (int y = 0; y < map.GetLength(0); y++)
            {
                for (int x = 0; x < map.GetLength(1); x++)
                {
                    spriteBatch.Draw(tiles[map[y, x]],
                        new Rectangle(
                            x * tileWidht,
                            y * tileHeight,
                            tileWidht,
                            tileHeight),
                        Color.White);
                }
            }

            base.Draw(gameTime);

            spriteBatch.End();
        }