Wood Plank Treater

SLOT_OUTPUT = 16

function intro()
    turtle.select(6)
    if turtle.getItemCount() > 0 then
        turtle.select(SLOT_OUTPUT)
        turtle.craft()
        turtle.dropDown()
    end

    turtle.select(6)
    turtle.drop()

    turtle.select(1)
    num = turtle.getItemCount()
    for i = 1, num do
        doCrafting()
    end
end

function safeSuck()
    while not turtle.suck() do
        sleep(0.5)
    end
end

function getPlanks()
    indices = {1, 2, 3, 5, 7, 9, 10, 11}
    for _, i in pairs(indices) do
        turtle.select(i)
        turtle.suckUp()
        if not turtle.getItemCount() == 64 then
            return false
        end
    end
    return true
end

function doCrafting()
    -- get creosote oil
    turtle.select(6)
    safeSuck()

    turtle.select(SLOT_OUTPUT)
    turtle.craft()
    turtle.dropDown()

    turtle.select(6)
    turtle.drop()
end

intro()
while getPlanks() do
    for i = 1, 64 do
        doCrafting()
    end
end