#!/usr/local/bin/ruby
module FizzBuzz
  refine Integer do
    def fizzbuzz()
      fz = ''
      fz += 'Fizz' if self % 3 == 0
      fz += 'Buzz' if self % 5 == 0
      if (fz == '') then self.to_s else fz end
    end
  end
end

1.upto 30 do |n|
  using FizzBuzz
  puts n.fizzbuzz
end