gistfile1.rb

class Animal
  attr_accessor :name
  attr_reader :size, :color

  def initialize(name, size, color)
    @name = name
    @size = size
    @color = color
  end

  def walk
    "walking..."
  end

  def eat
    "eating..."
  end

  def sleep
    "sleeping..."
  end

end

class Dog < Animal

  def bark
    "Ruff!"
  end

end

class Cat < Animal

  def meow
    "Meow..."
  end

end