# File src/card.rb, line 63
  def back(path)
    @img[:back] = Image.load path
    @hash[:back][:scalex] = @w.to_f / @img[:back].width
    @hash[:back][:scaley] = @h.to_f / @img[:back].height
    @@img = @img
    @@hash = @hash
  end