Computercraft Turtle Steinfliesen Boden

function checkInventory(curSlot)
    if turtle.getItemCount(curSlot) == 0 and curSlot < 16 then
        print(curSlot)
        curSlot = curSlot + 1
        print(curSlot)
    end
    turtle.select(curSlot)
    return curSlot
end

function rotate(i)
    if i ~= 1 then
        if i%2 == 0 then
               turtle.turnLeft()
            turtle.forward()
            turtle.turnLeft()
        else
            turtle.turnRight()
            turtle.forward()
            turtle.turnRight()
        end
     end
end

print("länge")
local len = read()
len = len - 1
print("breite")
local wid = read()

curSlot = 1

for i=1, wid do
    rotate(i)
    for j=1, len do
        curSlot = checkInventory(curSlot)
        turtle.digDown()
        turtle.placeDown()
        turtle.forward()
    end
    curSlot = checkInventory(curSlot)
    turtle.digDown()
    turtle.placeDown()
end