stairwell analysis cont.

[12"razormix]

http://bulletin.zefrank.com/showthread.php?t=5022&page=40

http://farm1.static.flickr.com/99/279386952_2bd4c2a082_o.jpg

[zero]

.
http://brilliantparents.com/wp-content/uploads/2006/01/numbers_in_stairs.jpg