Turtle Autocraft

-----------------------------------------------------
-- Turtle SmoothStoneCraft-- (c) Muzze77 ------------
-----------------------------------------------------
local schlaf = 0.5
local function cut()
        sleep(schlaf)
        shell.run("clear")
        sleep(schlaf)
end
----------------------------------------
local function suck()
        turtle.select(num)
        sleep(0.5)
        turtle.suckUp()
        slot = turtle.getItemCount(num)
        slot = slot-1
        sleep(1)
        turtle.dropUp(slot)
        sleep(1)
end
back = rs.getInput("back")
----------------------------------------
item = 0
while back == true do
    print("Crafted")
    num = 2
    suck()
-------------------
    num = 5
    suck()
------------------
    num = 6
    suck()
------------------
    num = 9
    suck()
    turtle.select(16)
    turtle.craft()
    sleep(0.2)
    turtle.dropDown()

    item = item+1
    print(item)
    cut()
end
print("no Signal")
cut()
shell.run("clear")
shell.run("reboot")