How to preform action every 5 seconds?

So i am creating a mob bar that will run at the top of my server. But i want it to display a List<String> of messages and cycle through them every 5 seconds. How would i do this? And how would i make it so when they join it automatically assigns it to them but they have the option to turn the messages off?

 

ImPhantom
Make a Bukkit Scheduler. Here's a link for a tutorial:
http://wiki.bukkit.org/Scheduler_Programming#BukkitScheduler

 

multikus
So... I got the scheduler working. But one more question. How would i loop through a string list every 20ticks in the scheduler?

 

I think you could just put the scheduler in a for loop
for(String s : List<String>){
do something
scheduler

 

You could also use a Repeating Scheduler (Code has been taken from the link I sent you earlier):

Code:java

 
public void onEnable() {
        BukkitScheduler scheduler = Bukkit.getServer().getScheduler();
        scheduler.scheduleSyncRepeatingTask(this, new Runnable() {
            @Override
            public void run() {
                // Run Whatever code you might have
            }
          //0L stands for how many times you want to run it. 0L is forever
          //20L stands for how many ticks until the code will be executed
          //So this will make the Code run forever every twenty ticks
        }, 0L, 20L);
    }