Please can someone help me ith my gui

hi i was wondering if someone could help me achieve a gui crafting system where you can change pages. i already have made the crafting system i just need to know how to change  pages in the crafting menu. please can some one help me. here is a concept iameg of what i want to achieve :

https://www.dropbox.com/s/xm71h6xt4q8ttwk/crafting%20system%20concept.png?dl=0

and here is my crafting script:

http://pastebin.com/QmfZD2mv


thank you for helping me

I recommend trying the new Request section of the forum. Maybe you'll get some help there.

--New Developer

ok thank you