-- spiral outwards and place torches
-- it never stops

local mv = require("movement")

local function ensureSpaceAbove()
  local success, data = turtle.inspectUp()
  if success and not data.name:find("torch") then
    turtle.digUp()
  end
  turtle.suck()
end

local function placeTorch()
  local i = 0
  while not turtle.detectDown() do
    mv.down()
    i = i+1
  end
  if i == 0 then
    ensureSpaceAbove()
    turtle.turnRight()
    if not turtle.placeUp() then
      turtle.digDown()
      mv.placeItem("torch", turtle.placeDown)
    end
    turtle.turnLeft()
  else
    mv.up()
    mv.placeItem("torch", turtle.placeDown)
    mv.nTimes(i-1, mv.up)
  end
end

local function forward()
  ensureSpaceAbove()
  mv.forward()
end

local function main(delta)
  local i = 1
  while true do
    for j=1,2 do
      for k=1,i do
        placeTorch()
        mv.nTimes(delta, forward)
      end
      turtle.turnRight()
    end
    i = i+1
  end
end

local args = {...}
main(tonumber(args[1] or 1))