gridMine

local tArgs = {...}
local tunnels
local length

local tunnels = tonumber(tArgs[1])
local length = tonumber(tArgs[2])
local counter = 0

function gridMine()
  for i = 0, tunnels - 1 do
    for z = 0, length do
      dig()
      digUp()
      if z ~= 0 and z % 6 == 0 then
        turtle.up()
        turtle.turnRight()
        turtle.dig()
        turtle.select(1)
        turtle.place()
        turtle.turnLeft()
        turtle.down()
      elseif z == length then
        turtle.up()
        turtle.dig()
        turtle.select(1)
        turtle.place()
        turtle.down()
      end
    end
    if (i % 2 == 0) then
      turtle.turnRight()
    else
      checkInventory()
      turtle.turnLeft()
    end
    if i == 1 then
      for x = 0, 2 do
        dig()
        digUp()
      end
    end
      turtle.turnLeft()
      turtle.turnLeft()
      for x = 0, 2 do
        dig()
        digUp()
      end
    for z = 0, 6 do
      dig()
      digUp()
    end
    turtle.turnRight()
    turtle.turnRight()
    for z = 0, 2 do
      turtle.forward()
    end
    if (i % 2 == 0) then
      turtle.turnRight()
    else
      turtle.turnLeft()
    end
  end
  turtle.turnLeft()
  while not turtle.detect() do
    turtle.forward()
  end
end

function dig()
  while not turtle.forward() do
    turtle.dig()
    sleep(.25)
  end
end

function digUp()
  turtle.digUp()
  sleep(.25)
end


function checkInventory()
  turtle.select(16)
  if turtle.getItemCount() > 0 then
    turtle.turnLeft()
    while not turtle.detect() do
      turtle.forward()
      counter = counter + 1
    end
    for i = 2, 16 do
      turtle.select(i)
      turtle.drop()
    end
    turtle.turnLeft()
    turtle.turnLeft()
    for i = 0, counter - 1 do
      turtle.forward()
    end
    turtle.turnLeft()
  end
end

gridMine()