module Flight
  def fly
    puts "I'm a #{self.class}, I'm flying!"
  end
end

class Animal
    attr_accessor :num_legs, :size
    def initialize (num_legs, size)
      @num_legs = num_legs
      @size = size
    end
end

class Mammal < Animal
  attr_accessor :gives_milk
  def initialize (num_legs, size)
    super(num_legs, size)
    @gives_milk = true
  end
end

class Amphibian < Animal
  attr_accessor :cold_blooded
  def initialize (num_legs, size)
    super(num_legs, size)
    @cold_blooded = true
  end
end

class Primate < Mammal

  def initialize (num_legs, size)
    super(2, size)
  end
end

class Bird < Animal
  include Flight
  attr_accessor :wings
  def initialize (num_legs, size)
    super(2, size)
    @wings = true
  end
end

class Frog < Amphibian
  attr_accessor :colour
    def initialize(num_legs, size)
      super(4, size)
      @colour = colour
    end
end

class Bat < Mammal
  include Flight
  attr_reader :night
  def initialize(num_legs, size)
    super(2, size)
    @night = true
  end
end

class Parrot < Bird
  attr_reader :talks
  def initialize(num_legs, size)
    super(2, size)
    @talks = true
  end
end

class Chimpanzee < Primate
    attr_reader :name, :age
  def initialize(num_legs, size, name, age)
    super(2, size)
    @name = name
    @age = age
  end
end

@purru = Parrot.new(2, 'big')
puts @purru.talks
puts @purru.fly

@dracul = Bat.new(2, 'small')
puts @dracul.fly

@george = Chimpanzee.new(2, 'big', 'georgie', 2)
puts @george.age
puts @george.num_legs
puts @george.name

@kathy = Animal.new(4, 'big')
puts @kathy.num_legs
puts @kathy.size