title: Total newbie: Instance variables in ruby?
body: <p>Pardon the total newbiew question but why is @game_score always nil?</p>
  
  <pre><code>#bowling.rb
  
  class Bowling
    @game_score = 0
      def hit(pins)
          @game_score = @game_score + pins
      end
  
      def score
          @game_score
      end
  end
  </code></pre>