modules.rb

require 'pry'

module Driveable
  def go
    "Vroom Vroom!"
  end

  def stop
    "Sad."
  end

  def self.included(base)
    base.extend(HasWheels)
  end

  module HasWheels
    def has_wheels?
      true
    end
  end

end


class Car
  include Driveable

end

class Bus
  include Driveable
end

class Boat
  include Driveable

  def go
    "hrrbrlblblblblblblblblblblblblb"
  end
end

class Truck < Car

  def go
    super + " VRRRRRRRROOOOOOOMMM"
  end
end