---
Variabeln
---
curslot = 2

function turnright()
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
end

function turnleft()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
end

function checkblockcount()
        if turtle.getItemCount(curslot) == 0 then
                selnextslot()
        end
end

function selnextslot()
        curslot = curslot + 1
        if curslot > 16 then
                print("Out of blocks, terminating")
                error()
        end
        turtle.select(curslot)
end

function place()
        checkblockcount()
        turtle.placeDown()
        turtle.forward()
end


----------

for i=1, 3 do
    place()
end
turnright()
for i=1, 3 do
    place()
end
turnleft()
for i=1, 3 do
    place()
end