remember sherlock holmes? ( /ˈʃɜrlɒk ˈhoʊmz/) is a fictional detective created by Scottish author and physician Arthur Conan Doyle. The fantastic London-based "consulting detective", Holmes is famous for his astute logical reasoning, his ability to take on almost any disguise, and his use of science skills to solve difficult cases.

the one story i read and very llike is about Sherlock Holmes' story "The Adventure of the Dancing Men", a man reports that his wife, Elsie, became upset when she received several notes with figures of dancing men on them. Holmes went about deciphering the code.

that story come to my mind and i was thingking like "is this code really exist or just sherlock holmes fictional nedded?". after all sherlock fans are often use this dancing man code in real life.
so, in summary this code become exist because the existence of sherlock fans.
below are the aplhabet chart of dancing men code:
There are two sets of characters, ones with and ones without flags. The characters holding a flag in one hand mark the last letters of words. The last letter of the last word may or may not have a flag.

source:
http://www.purplehell.com/riddletools/danceman.htm
http://en.wikipedia.org/wiki/The_Adventure_of_the_Dancing_Men
http://britton.disted.camosun.bc.ca/dancmen.jpg