Minecraft Turtle: Top Platform

--[[
        Minecraft Turtle: Top Platform
        2013 (c) psychedelixx
        2013-12-15

        Builds a simple platform

        Usage:
        - use turtle and type "label set <name>"
          (to give your turtle an unique name so it remembers its programs)
        - type "pastebin get 5cuDGCK7 topPlatform"
--]]

dirCounter = 1
width = 2
length = 2

--[[ --- Parameter ---- ]]--
local args = { ... }

if #args == 1 then
    width  = tonumber(args[1])
    length = width
end

if #args == 2 then
    width  = tonumber(args[1])
    length = tonumber(args[2])
end

if width*length > 1024 then
    print("max size: 1024 (32*32)")
end

if turtle.getFuelLevel() < width * length then
    turtle.refuel()
end

if turtle.getFuelLevel() < width * length then
    print("Amount of missing fuel: ", width * length - turtle.getFuelLevel())
    print("Missing fuel in coal: ", (width * length - turtle.getFuelLevel())/80+1)
end

sumItems = 0
for i=1, 16, 1 do
    sumItems = sumItems + turtle.getItemCount(i)
end

    print("Not enough Resources")
    print("Press enter to continue")
    read()

    print("======== 2013 (c) psychedelixx ========")
    print("=========== Platform Builder ==========")


    slot = 1

    for w=1, width, 1 do
    for l=1, length, 1 do
        while turtle.getItemCount(slot) == 0 and slot < 16 do
            slot = slot + 1
        end
        if turtle.getItemCount(slot) == 0 and slot == 16 then
            print("No more ressources... Fill me up and press enter")
        read()
            slot = 1
        end
            turtle.select(slot)

            turtle.digUp()
            turtle.placeUp()
        if l < length then
                turtle.dig()
            turtle.forward()
        end
    end

    if w < width then
            if dirCounter%2 == 1 then
                turtle.turnRight()
            turtle.forward()
            turtle.turnRight()
        else
            turtle.turnLeft()
            turtle.forward()
            turtle.turnLeft()
        end
        else
            if dirCounter%2 == 1 then
                turtle.turnRight()
            turtle.turnRight()
        for l=1, length-1, 1 do
                turtle.forward()
                end
        end
        turtle.turnRight()

        for w=1, width-1, 1 do
            turtle.forward()
            end
    end
    dirCounter = dirCounter + 1
    end