tunnelbore.lua

conf_x = 5
conf_y = 5

function inc(arg)
  return component.proxy(component.list(arg)())
end

local r = inc("robot")
local c = inc("computer")
local ch = inc("chunkloader")

-- The bot also needs a chunkloader upgrade installed
-- 4 Inventory Upgrades and an inventory controller upgrade is recommended

if not (result = ch.setActive(true)) then
  c.beep(1000, 1)
  c.beep(2000, 1)
  c.stop()
end

for x = 1, conf_x, 1 do
  for y = 1, conf_y, 1 do
    r.swing(3)
    if y < conf_y then
      r.move(1)
    end
  end

  if x < conf_x then

    for d = 1, (conf_y - 1), 1 do
      r.move(0)
    end

    r.turn(true)
    r.move(3)
    r.turn(false)
  end
end