old_contents: module.exports = {
    factory: function() {
      return {};
    },
    reset: function(lightning) {
      delete lightning.points;
    }
  };
  
new_contents: module.exports = {
    factory: function() {
      return {
        elapsed: 0
      };
    },
    reset: function(lightning) {
      lightning.elapsed = 0;
      delete lightning.points;
    }
  };
  
subject: Reset lightning elapsed time