How to make count up scoreboard

So how to make count up scoreboard with java? When you execute command "/countup" you get scoreboard where is count up like 00:01, 00:02, 00:03 etc. When you execute "/countup clear" that clear time and wipe your scoreboard.

 

I try to make scoreboard with countup.

 

That is all what I got:

Code (Text):

public class MatchTimer extends BukkitRunnable {
    private int time;
    public static boolean paused;
   
    public void timer() {
        this.runTaskTimer(Main.getPlugin(Main.class), 0, 20);
        System.out.println("[email protected]");
    }
   
    public static void setPaused(boolean value) {
        paused = value;
    }

    @Override
    public void run() {
        if (!paused) {
            System.out.println("[email protected]");
            if (time != 0) {
                 time++;
                 System.out.println(time);
            }
            System.out.println("not paused");
        } else {
            System.out.println("paused");
        }
    }
}

 

Yes, but I never got the timer to work. Problem is on timer not on scoreboard.