bottle.rb

class Song
  def initialize
    @bottles = 99
  end
  
  def sing
    @bottles.downto(0) do |bottle|
      if bottle > 1
        puts "#{bottle} bottles of beer on the wall, #{bottle} bottles of beer."
        puts "Take one down and pass it around, #{bottle - 1} bottles of beer on the wall.\n"
      elsif bottle == 1
        puts "1 bottle of beer on the wall, 1 bottle of beer."
        puts "Take one down and pass it around, no more bottles of beer on the wall."
      elsif bottle == 0
        puts "No more bottles of beer on the wall, no more bottles of beer."
        puts "Go to the store and buy some more, 99 bottles of beer on the wall."
      end 
    end
  end
end

Song.new.sing