i need help with my mining program

So i have recently been starting to make turtle programms, so i am not that good at it.
Right now i am trying to make a programm that should find diamonds.
I am not that far with it right now because i have some problems with the turtle.inspect command.
I am playing on ftb lite v1.2.3 minecraft v.1.4.7 thats the code so far:
https://pastebin.com/Ejz8Y0VT

I hope that somebody will help me.
Kind regards
Sneed

The function turtle.inspect did not exist in such an ancient version of the mod. You can check the wiki for the minimum version requirement.

Alright i upgraded to a newer version now, but how can I get it to work with inspect now?