Turtle room with args top down

local args = {...}

if not #args == 3 then
  print("Usage: clear <x y z>")
  return
end


local x = tonumber(args[1]) - 1
local y = tonumber(args[2])
local z = tonumber(args[3])

if x == nil or y == nil or z == nil then
  print("Invalid dimensions")
  return
end

if x < 0 or y < 0 or z < 0 then
  print("Invalid (negative) dimensions")
  return
end

local fuel = turtle.getFuelLevel()
local roomSize = x * y * z
while fuel < roomSize do
  if not turtle.refuel(1) then
    print("Not enough fuel, needs " ..  roomSize .. " fuel do dig, add " .. (roomSize-fuel) .. " more to dig this size")
    return
  end
end

local direction = true
for i = 1, z do
  for j = 1, y do
    for k = 1, x do
      turtle.dig()
      while not turtle.forward() do turtle.dig() end
    end
    if j < y then
      if direction then
        turtle.turnRight()
        turtle.dig()
        while not turtle.forward() do turtle.dig() end
        turtle.turnRight()
        direction = false
      else
        turtle.turnLeft()
        turtle.dig()
        while not turtle.forward() do turtle.dig() end
        turtle.turnLeft()
        direction = true
      end
    end
  end
  if i < z then
    turtle.digDown()
    while not turtle.down() do turtle.digDown() end
    turtle.turnRight()
    turtle.turnRight()
  end
end