Gamefic.script do
  respond :close, Use.available do |actor, thing|
    actor.tell "You can't close #{the thing}."
  end

  respond :close, Use.available(Openable) do |actor, thing|
    if thing.open?
      actor.tell "You close #{the thing}."
      thing.open = false
    else
      actor.tell "#{The thing} is already closed."
    end
  end
end