AutoMessage

    public class AutoMessage implements Runnable
    {

        public int currentIndex = 0;
        private ArrayList<String> messages;

        public AutoMessage(List<String> messages)
        {
            this.messages = new ArrayList<>(messages);
        }

        @Override
        public void run()
        {
            if (currentIndex >= messages.size())
            {
                currentIndex = 0;
            }

            Bukkit.broadcastMessage(messages.get(currentIndex).replace("&", "§"));

            currentIndex++;
        }

    }