require 'rainbow'

puts "enter a number"
mod = Integer(gets)

(0..mod-1).each do |i|
  row = ""
  (0..mod-1).each do |j|
    if ((j * i) % mod) == 1
      row += " #{(j * i) % mod}".ljust(3).color(:red)
    else
      row += " #{(j * i) % mod}".ljust(3).color((i*j) % 255, 255, 255)
    end
  end
  puts row
end