[Lua][Question/Help] Room digging turtle

Hi there, I'm trying to develop a turtle program that digs out variable size rooms. I havent got any errors with exectution but I dont get whats wrong with this code. Thank you for your help.
Pastebin link: http://pastebin.com/rdn9sbaQ

nylser

could you let us know what it is doing wrong if it is not erroring

Please tell us what's wrong with it…

Also:

for i = 1, 3 do
    if tArgs[i] == "0" then
	    print("Usage: ")
	    print("dig <length> <width> <height>")
    end
end

This would be better:

if #tArgs ~= 3 then
    print("Usage: ")
    print("dig <length> <width> <height>")
    return -- Exit the program
end