Calculates and displays card position in a 9 pocket page

pockety.rb

#!/usr/bin/env ruby

DIV = %w[
  ╭─────┬─────┬─────╮
  ├─────┼─────┼─────┤
  ├─────┼─────┼─────┤
  ╰─────┴─────┴─────╯
]
ROW = "│ %3s │ %3s │ %3s │"

ARGV.each do |pos|
  pos  = Integer pos

  page = pos / 9 + 1
  rest = pos % 9
  row  = rest / 3
  col  = rest % 3

  puts "PAGE #{page}:"
  0.upto 2 do |y|
    puts DIV[y]
    if row != y then puts format(ROW, "", "", "")
    elsif col == 1 then puts format(ROW, pos, "", "")
    elsif col == 2 then puts format(ROW, "", pos, "")
    elsif col == 3 then puts format(ROW, "", "", pos)
    end
  end
  puts DIV[3]
  puts
end