local tArgs = { ... }
if #tArgs ~= 3 then
  print("Usage: clearArea <width> <length> <height>")
  return
end

local length = tonumber(tArgs[1])
local width  = tonumber(tArgs[2])
local height = tonumber(tArgs[3])

if(length < 1 or width < 1 or length < 1) then
  printError("Arguments cannot be negative.")
  return
end

-- Forward/backwards
local xTraveled = 0
-- left/righ
local yTraveled = 0
-- up/down
local zTraveled = 0

local totalToMine = length * width * height
local blocksMined = 0

local zDir = 0

local function turn()
  if math.fmod(yTraveled, 2) == 0
    turtle.turnRight()
  else
    turtle.turnLeft()
  end
end

local function digZ()
  if(zDir == 1)
    if turtle.detectUp() then
      turtle.digUp()
    end
    turtle.up()
  else
    if turtle.detectDown() then
      turtle.digDown()
    end
    turtle.down()
  end
end

local function dig()
  while(blocksMined < totalToMine)
    while(xTraveled < length)
      while(zTraveled < height)
        digZ()
        blocksMined = blocksMined + 1
        zTraveled = zTraveled + 1
      end
      zTraveled = 0
      zDir = -zDir
      if turtle.detect() then
        turtle.dig()
        blocksMined = blocksMined + 1
      end
      turtle.forward()
      xTraveled = xTraveled + 1
    end
    xTraveled = 0
    turn()
    if turtle.detect() then
      turtle.dig()
    end
    turtle.forward()
    turn()
    yTraveled = yTraveled + 1
    blocksMined = blocksMined + 1
  end
end

dig()