3x3tunnel

-- todo section
-- enter to terminate/pause

local tArgs={...}
if tArgs[1] == nil then
  term.clear()
  term.setCursorPos(1, 1)
  print("How far do you want to go?")
  tArgs[1] = read()
end

local function clear()
    term.clear()
    term.setCursorPos(1, 1)
end

local function timesfuelcheck()
  term.clear()
  term.setCursorPos(1, 1)
  print("turtle will stop when this number reaches zero: "..m)
  print("fuel remaining: "..turtle.getFuelLevel())
  print("blocks dug: "..dignumb)
  if extrainfonumb ~= 0 then
    print(extrainfo)
  elseif extrainfonumb == 0 then
  end
  term.setCursorPos(1, 12)
  print("Bottom right slot needs to have torches")
end

local function checkdig()
  while turtle.detect() do
    turtle.dig()
    dignumb=dignumb+1
    timesfuelcheck()
    sleep(.5)
  end
  while turtle.suck() do
  end
end

local function checkdigUp()
  while turtle.suckUp() do
  end
  while turtle.detectUp() do
    turtle.digUp()
    dignumb=dignumb+1
    timesfuelcheck()
    sleep(.5)
  end
end

local function checkdigDown()
  while turtle.suckDown() do
  end
  while turtle.detectDown() do
    turtle.digDown()
    dignumb=dignumb+1
    timesfuelcheck()
    sleep(.5)
  end
end

local function checkdigLeft()
  turtle.turnLeft()
  checkdig()
  turtle.turnRight()
end

local function checkdigRight()
  turtle.turnRight()
  checkdig()
  turtle.turnLeft()
end

local function checkplaceDown()
turtle.select(1)
  while not turtle.detectDown() do
    if turtle.placeDown() == true then
      turtle.placeDown()
    elseif turtle.placeDown() == false then
      x = 1
      repeat
        print("Something failed. Attempting to fix it.")
        x=x+1
        turtle.select(x)
        sleep(.3)
      until
        x==15 or turtle.placeDown() == true
          if x==15 then
            term.clear()
            term.setCursorPos(1, 1)
            print("no placeable items in any of the slots")
            print("rechecking in four seconds.")
            print("4")
            sleep(1)
            print("3")
            sleep(1)
            print("2")
            sleep(1)
            print("1")
            sleep(1)
            print("rechecking")
            sleep(.5)
            checkplaceDown()
          elseif turtle.placeDown() == true then
            sleep(.3)
            print("continuing")
          end
    end
  end
end


BlocksNeeded = 10
TorchesNeeded = tArgs[1] / 5

local i = 0
local timer = os.startTimer(1)
clear()
while math.ceil(TorchesNeeded - turtle.getItemCount(16)-1) >= 0 do
    clear()
    if BlocksNeeded-turtle.getItemCount(1)-1 >= 0 then
      print("I recommend "..BlocksNeeded-turtle.getItemCount(1).." more blocks.")
    end
    if math.ceil(TorchesNeeded - turtle.getItemCount(16)) >= 0 then
      print("Need "..math.ceil(TorchesNeeded-turtle.getItemCount(16)).." more torches in the bottom right slot.")
    else
      print("Enough torches")
    end
    print()
    print("       Press any letter to skip")

    local evt, arg = os.pullEvent()
    if evt == "timer" then
        if arg == timer then
            i = i + 1
            print(i)
            timer = os.startTimer(1)
        end
    elseif evt == "char" then
            break
    end
end

clear()
turtle.select(1)
dignumb = 0
extrainfonumb = 0
m = tArgs[1]
torch = 5
for i = 1, tArgs[1] do
    timesfuelcheck()
    checkdig()
    turtle.forward()
    checkdigLeft()
    checkdigRight()
    checkdigUp()
    turtle.up()
    checkdigLeft()
    if torch == 5 then
        turtle.turnRight()
        checkdig()
        turtle.select(16)
        if turtle.place() == true then
            extrainfonumb = 3
            extrainfo = "placing torch"
            timesfuelcheck()
            turtle.place()
            torch = 0
        else
          extrainfonumb = 3
          extrainfo = "unable to place"
          timesfuelcheck()
          torch = 0
        end
        turtle.turnLeft()
        turtle.select(1)
    else
        checkdigRight()
    end
    checkdigDown()
    turtle.down()
    checkdigDown()
    turtle.down()
    checkplaceDown()
    checkdigLeft()
    checkdigRight()
    turtle.up()
    torch = torch+1
      if extrainfonumb ~= 0 then
        extrainfonumb = extrainfonumb-1
      end
    m = m-1
    timesfuelcheck()
end