module Flight
  attr_accessor(:flight_speed)
  def fly
    puts "I am a #{self.class}, I am flying at #{flight_speed} miles per hour"
  end
end

class Animal
  attr_accessor(:brain)
  def initialize(brain)
    @brain = brain
  end
end

class Mammal < Animal
  def initialize(brain)
    super(brain)
  end

  def live_birth
    puts "I have live birth"
  end
end

class Amphibian < Animal
  def initialize(brain)
    super(brain)
  end
  def lay_egg
    puts "I can lay an egg"
  end
end

class Primate <  Mammal
  def initialize(brain)
    super(brain)
    @legs = 2
  end

  def land_dweller
    puts "I like the land"
  end
end

class Frog < Amphibian
 def initialize(brain)
    super(brain)
  end
end

class Chimpanzee < Primate
  def initialize(brain)
    super(brain)
  end

  def tools
    puts "I can use tools"
  end
end

class Bat < Animal
include Flight
  def initialize(brain)
    super(brain)
  end
end

class Parrot < Animal
include Flight
  def initialize(brain)
    super(brain)
  end

end


bat1 = Bat.new(true)
bat1.flight_speed = 2
bat1.fly

parrot1 = Parrot.new(true)
parrot1.flight_speed = 7
parrot1.fly