Tellraw Menu [Commands]

Tellraw Menu Commands:
Blog post: http://siberianhat.blogspot.com.br/2015/10/the-command-book-and-tellraw-menu.html

On a repeating command block then chain command blocks:
/scoreboard players set @a[rxm=87,rx=90,score_menu=0] menu 1
/scoreboard players set @a[score_menu_min=1,score_menu=1,rxm=72,rx=86] menu 2
/tellraw @a[score_menu_min=2,score_menu=2,rxm=90,rx=90] <tellraw>
/scoreboard players set @a[score_menu_min=2,score_menu=2,rxm=90,rx=90] menu 3
/tellraw @a[score_menu_min=4] <tellraw>
/scoreboard players set @a[score_menu_min=4] menu 3
/scoreboard players set @a[score_menu_min=1,rxm=-90,rx=71] menu 0

note: The players need to have a score on the menu objective for this to work. To do that, use /scoreboard players add @a menu 0