DouKaku?

#! c:\ruby\bin\ruby.exe -Ks

String.class_eval do |string|
    def words
        self.split(//)
    end
    def fix_width(width, padding)
        (self.words.size > width) ? self : (padding * (width - self.words.size) + self)
    end
end

Fixnum.class_eval do |fixnum|
    alias :to_s_orig :to_s
    def to_s(base, width)
        binary = self.to_s_orig(base).fix_width(width, "0")
    end
end

class BinaryClock
    attr_accessor :now
    def initialize
        self.now = Time.now
    end
    def print
        output(self.now.hour.to_s(2, 5))
        output(self.now.min.to_s(2, 6))
    end
private
    def output(binary)
        puts binary.words.map { |f| f == "0" ? "□" : "■" }.join.fix_width(6, "　")
    end
end

BinaryClock.new.print

let itobin i =
  if i == 0 then [0]
  else
    let rec itob l i = match i with
        0 -> 1::l
      | 1 -> 1::l
      | _ -> itob ((i mod 2)::l) (i/2)
    in itob [] i
;;

let rec padding l = 
  if (List.length l) < 6 then padding (0::l)
  else l
;;

let format_print l = 
  let d = [|"□";"■"|] in 
  let rec square_print l = match l with
    [] -> print_string "\n"
  | s::r -> print_string d.(s);
      square_print r
    in square_print l
;;


let () = 
  let t = Unix.localtime(Unix.time()) in
  format_print (padding (itobin t.Unix.tm_hour));
  format_print (padding (itobin t.Unix.tm_min))
;;