#!/usr/bin/ruby

[30..37, 90..97].each{|fg_range|
   fg_range.each{|fg|
      [40..47, 100..107].each{|bg_range|
         bg_range.each{|bg|
            print "\e[" + fg.to_s() + ";" + bg.to_s() + "m"
            [" ", "\xe2\x96\x91", "\xe2\x96\x92", "\xe2\x96\x93"].each{|c|
               print c
            }
            print "\e[0m"
         }
      }
      print "\n"
   }
}
print "\n"

(0..15).each{|x|
   (0..15).each{|y|
      print "\e[1;48;5;" + (x * 16 + y).to_s() + "m"
      [" ", "\xe2\x96\x91", "\xe2\x96\x92", "\xe2\x96\x93"].each{|c|
         print c
      }
   }
   print "\e[0m\n"
}