. - + 2
http://thecheesethief.blogspot.com/2011/11/how-to-weave-paper-ball-ornament.html
http://howaboutorange.blogspot.com/2011/12/make-garland-from-woven-paper-balls.html
" ": 1 - . 2 - . ... 11 - . 12 - . ... 13 - . - + 2 14 - . 15 - : . ... 29 - . 2 . 30 - . 31 - - !