milk.lua

while true do
    -- Get milk
    turtle.place()

    -- turn and place milk
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.drop()
    os.sleep(5)

    -- Suck out all of the items
    while not turtle.suck() do
    end
    while turtle.suck() do
    end

    -- Place all that is not a bucket
    local bucket_id = 0
    for i = 1, 16 do
        turtle.select(i)
        if turtle.getItemDetail(i) ~= nil then
            if not string.match(turtle.getItemDetail(i).name, "bucket") then
                turtle.drop()
            else
                bucket_id = i
            end
        end

    end

    -- Turn back to cow
    turtle.turnRight()
    turtle.turnRight()
    turtle.select(bucket_id)
end