Mining Turtle that mines just like wyld

I made a program that mines a 3 by 3 tunnel and does branchs off each side every 4 blocks. A live streamer named wyld does the same exact mining technique. I am not saying it is perfect so if there is any bugs tell me and give me any tips.
The pastebin code is: KKKF2bPv

Works pretty well. Now it needs a way refuel when it's low/empty, and to go back to its starting position.
I notice you have a lot of "while not turtle.forward() do turtle.dig() end" in your code. As a general rule, if you have 2 or more places where your code repeats, it's probably a good idea to turn it into a function.

Ok I'll look at fixing the code soon