```ruby
module Pentago
  class DummyPlayer < Pentago::Player
    def compute_next_move(board)
      # search for empty space w/ a highly precise algorithm :)
      x, y = rand(Pentago::Board::COLS), rand(Pentago::Board::ROWS)
      while board[x,y]
        x, y = rand(Pentago::Board::COLS), rand(Pentago::Board::ROWS)
      end

      # equally, search for a square to turn? into which direction
      square    = rand(Pentago::Board::SQUARES.size)
      direction = Pentago::Board::ROTATION_DIRECTIONS.sample

      # now return a sure winning move...
      [x, y, square, direction]
    end
  end
end```

Fix class scoping and rewrite position calc loop.
user
```ruby
module Pentago
  class DummyPlayer < Player
    def compute_next_move(board)
      # search for empty space w/ a highly precise algorithm :)
      begin
        x, y = rand(Board::COLS), rand(Board::ROWS)
      end while board[x,y]

      # equally, search for a square to turn? into which direction
      square    = rand(Board::SQUARES.size)
      direction = Board::ROTATION_DIRECTIONS.sample

      # now return a sure winning move...
      [x, y, square, direction]
    end
  end
end
```
assistant