StripMine

local args = {...}

local t = turtle

local n = args[1]


function forceForward()
  while not t.forward() do
    t.dig()
  end
end

function forceUp()
  while not t.up() do
    t.digUp()
  end
end

function forceDown()
  while not t.down() do
    t.digDown()
  end
end

function mineLayer(layer)
  if layer % 2 == 0 then
    forceForward()
    t.turnLeft()
    t.dig()
    forceUp()
    t.dig()
    if layer % 5 == 0 then
      t.place()
    end
    forceUp()
    t.dig()
    t.turnRight()
  else
    forceForward()
    t.turnLeft()
    t.dig()
    forceDown()
    t.dig()
    if layer % 5 == 0 then
      t.place()
    end
    forceDown()
    t.dig()
    t.turnRight()
  end
end

for i = 0, n do
  mineLayer(i)
end