Scoreboard Help

Ok so I have a plugin I'm working on and i need help setting up a scoreboard for a specific player in a game of tag
now what I would want it to do is when player hits player1 player1's name get put on a side bar scoreboard and player's name get removed from the scoreboard
And when that player hits someone it removes their name and adds the person they hit onto the scoreboard.

Here is my code:

Code:

@EventHandler
    public void entityDamageEntity(EntityDamageByEntityEvent e) {
        if (!(e.getDamager() instanceof Player));
        {
           
        Player player1 = (Player)e.getEntity();
        if (e.getEntity() instanceof Player);
        {
            Player player = (Player)e.getDamager();
            if (!player.getGameMode().equals(GameMode.CREATIVE)) return;
            Bukkit.getServer().broadcastMessage(ChatColor.LIGHT_PURPLE + "/" + ChatColor.AQUA + "Magic Touch" + ChatColor.LIGHT_PURPLE + "/ " + ChatColor.RED + player.getDisplayName() + ChatColor.DARK_GREEN +  " Killed " + ChatColor.RED + player1.getDisplayName());   
        teleportInword(player1, 401, 4, -806); //Change these values to match the arena map!
        Bukkit.getServer().broadcastMessage(ChatColor.LIGHT_PURPLE + "/" + ChatColor.AQUA + "Magic Touch" + ChatColor.LIGHT_PURPLE + "/ " + ChatColor.RED + player1.getDisplayName() + ChatColor.DARK_GREEN + " is now the it!");
        player.setGameMode(GameMode.SURVIVAL);
        player1.setGameMode(GameMode.CREATIVE);
        ItemStack block = new ItemStack(Material.REDSTONE_BLOCK, 1);
        ItemStack air = new ItemStack(Material.AIR, 1);
        player1.getInventory().setHelmet(block);
        player.getInventory().setHelmet(air);
        player1.setAllowFlight(false);
       
        }
        }
    }

 

coolmonkeyguy
I hope you know that this part here does nothing:

Code:java

if (!(e.getDamager() instanceof Player));
{

It should be this instead:

Code:java

if (e.getDamager() instanceof Player)
{

And also here:

Code:java

teleportInword(player1, 401, 4, -806); //Change these values to match the arena map!

you can change it to:

Code:java

teleportInword(player1, 401, 4, -806); // TODO: Change these values to match the arena map!

so your IDE will add this task to your todo list (if your IDE has such functionality)

And about your question. In your code I can't even a slightest attempt to create a scoreboard yourself. At least try it first, then come back and ask questions.