Program searching

I am not entirely sure if this should be posted here, I have searched the form a few times with various keywords trying to find a program that lets me tunnel then return the turtle to starting point.

Could someone point me to a program that can do this?

dist = 0
repeat
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  dist = dist  + 1
until turtle.getItemCount(9) > 1 --Change 9 to 16 if you have 16 block turtle slots
for back = 1, dist do
   turtle.back()
end

This would mine, in a staight line and go back when it's full

I was thinking more along the lines of the traditional tunnel system I wanted to pair it up with the dowsing rod in technic pack, but im sure I could tweak it to work.