branch

local tArgs = {...}
local length = tArgs[1]
local numTunnels = tArgs[2]
local inv = true
local checkTorch = 0

function tunnel()
  for i=1,length do
    turtle.dig()
    while turtle.forward() == false do
      turtle.dig()
    end
    turtle.digUp()
    torch()
  end
end

function turnAround()
  for k = 1,6 do
    turtle.dig()
    while turtle.forward() == false do
      turtle.dig()
    end
    turtle.digUp()
    torch()
  end

  checkInv()

  turtle.back()
  turtle.back()
  turtle.back()
end

function checkInv()
  for y = 2,16 do
    turtle.select(y)
    if turtle.compareTo(1) then
      turtle.drop()
    end
  end
end

function torch()
  if checkTorch == 10 then
    turtle.select(16)
    turtle.placeUp()
    turtle.select(1)
    checkTorch = 0
  else
    checkTorch = checkTorch + 1
  end
end

for j = 1,numTunnels do
  tunnel()
  turtle.turnLeft()
  turnAround()
  turtle.turnLeft()
  tunnel()
  turtle.turnRight()
  turnAround()
  turtle.turnRight()
end