코드

module TermColor
  COLORS = {black: 30, red: 31, green: 32, yellow: 33,  blue: 34, magenta: 35, syan: 36, white: 37, clear: nil}
  module ModuleMethods
    def method_missing(method, *args)
      if COLORS.has_key?(method)
        self.instance_eval <<-EOS
          def #{method}
            self.out_color_sequence(#{COLORS[method]})
          end
        EOS
        self.__send__(method)
      else
        super
      end
    end

    def out_color_sequence(num = nil)
      print "\e[#{num.to_s}m"
    end
  end

  extend ModuleMethods
end

if $0 == __FILE__
  TermColor.red
  puts "tomato"
  TermColor.black
  puts "coffee"
  TermColor.blue
  puts "blue hawaii"
  TermColor.blue
  puts "soda"
  TermColor.white
  puts "milk"
  TermColor.clear
end

실행 결과

・최면술 33!!（；ro）゜

총결산