FieldPrepare

args = {...}
arg1 = tonumber(args[1])

local function isempty(s)
  return s == nil or s == ''
end

if isempty(arg1) then
    print("")
    print("Benutzung: prepareField [1-6]")
    print("1 = Farmland - Slot 1")
    print("2 = 8 Inferium Layer - Slot 2")
    print("3 = 8 Prudentium Layer - Slot 3")
    print("4 = 8 Tertium Layer - Slot 4")
    print("5 = 8 Imperium Layer - Slot 5")
    print("6 = 8 Supremium Layer - Slot 6")
    print("Bitte die notwendigen Blöcke in die slots legen!")
else
    if (arg1 >= 1 and arg1 <= 6) then
        steps = arg1
    else
        print("Step-Angabe ausserhalb der Border!")
    end
end

function digLayer(dLayer, dBlocks)
    if dLayer == steps then
        turtle.dig()
        turtle.forward()
    else
        for i=dBlocks, 1, -1 do
            turtle.digDown()
            if not (dLayer == 1 and i==1) then
                turtle.down()
            end
        end
    end
end

function digHole (digStep)
    for i=digStep, 1, -1 do
        digLayer(i, 8)
    end
end

function placeLayer(pLayer, pBlocks)
    turtle.select(pLayer)
    if pLayer == 1 then
        turtle.back()
        turtle.place()
    else
        for i=pBlocks, 1, -1 do
            turtle.placeDown()
            if not (pLayer == 2 and i==1) then
                turtle.up()
            end
        end
    end
end

function placeBlocks(placeStep)
    for i=placeStep, 1, -1 do
        placeLayer(i, 8)
    end
end

function main()
    digHole(steps)
    placeBlocks(steps)
    print("Finished!")
end

if not isempty(steps) then
    main()
end