```ruby
module Vail
  class Generator
    def initialize(config)
      @config = config
      @config[:repetitions] ||= 1
      Dot.class_variable_set(:@@duration, @config[:dot][:duration])
      Dot.class_variable_set(:@@pause, @config[:dot][:pause])
      Dash.class_variable_set(:@@duration, @config[:dash][:duration])
      Dash.class_variable_set(:@@pause, @config[:dash][:pause])
    end
    def to_morse(phrase)
      instructions = []

      phrase.each_char do |char|
        if char == " "
          instructions << { :command => :sleep, :instruction => @config[:group][:pause].to_f/1000.0}
        else
          morse = Translate.to_morse(char)
          instructions << { :command => :sound, :instruction => morse.map { |dotdash| dotdash.to_sound(@config[:frequency]) }}
          instructions << { :command => :sleep, :instruction => @config[:letter][:pause].to_f/1000.0}
        end
      end

      @config[:repetitions].times.each do 
        instructions.each do |i|
          if i[:command] == :sound
            Beep::Sound.generate(i[:instruction])
          else
            sleep(i[:instruction])
          end
        end
      end
    end
  end
end
```

Refactor of building the morse instructions - first pass
user
```ruby
module Vail
  class Generator
    def initialize(config)
      @config = config
      @config[:repetitions] ||= 1
      Dot.class_variable_set(:@@duration, @config[:dot][:duration])
      Dot.class_variable_set(:@@pause, @config[:dot][:pause])
      Dash.class_variable_set(:@@duration, @config[:dash][:duration])
      Dash.class_variable_set(:@@pause, @config[:dash][:pause])
    end
    def to_morse(phrase)
      instructions = []

      phrase.each_char do |char|
        if char == " "
          instructions << { :command => :sleep, :instruction => @config[:group][:pause].to_f/1000.0}
        else
          morse = Translate.to_morse(char)
          instructions << { :command => :sound, :instruction => morse.map { |dotdash| dotdash.to_sound(@config[:frequency]) }}
          instructions << { :command => :sleep, :instruction => @config[:letter][:pause].to_f/1000.0}
        end
      end

      (@config[:repetitions].times.inject([]) { |r,i| r << instructions }).each do |instructions|
        instructions.each do |i|
          if i[:command] == :sound
            Beep::Sound.generate(i[:instruction])
          else
            sleep(i[:instruction])
          end
        end
      end
    end
  end
end
```
assistant