Playing around with method missing

wat.rb

module Powers
  def wattr_accessor(*attrs)
    wattr_reader(*attrs)
    wattr_writer(*attrs)
  end

  def wattr_reader(*attrs)
    attrs.each do |attr|
      define_method "#{attr}" do
        instance_variable_get(:"@#{attr}")
      end
    end
  end

  def wattr_writer(*attrs)
    attrs.each do |attr|
      define_method "#{attr}=" do |value|
        instance_variable_set(:"@#{attr}", value)
      end
    end
  end
end

class Wat
  extend Powers

  wattr_accessor :wat
  wattr_reader :lala
  wattr_writer :lala
end