Small army of these: http://goo.gl/qQYLv http://goo.gl/qQYLv plus a implementation of: http://en.wikipedia.org/wiki/Flood_fill http://en.wikipedia.org/wiki/F

Small army of these: http://goo.gl/qQYLv http://goo.gl/qQYLv plus a implementation of: http://en.wikipedia.org/wiki/Flood_fill http://en.wikipedia.org/wiki/Flood_fill