@EventHandler
    public void onDamage(EntityDamageByEntityEvent ev) {
        if (ev.getDamager() instanceof Player && ev.getEntity() instanceof Player) {
            Player pl = (Player)ev.getEntity();
            Player to = (Player)ev.getDamager();
            String toPlayer = "";
            if(pl.getHealth()%2 != 0) {
                for(int i = 0; i < (pl.getHealth()-1)/2; i++) {
                    toPlayer = toPlayer + "❤";
                }
                toPlayer = toPlayer + "♥";
            }
            else {
                for(int i = 0; i < pl.getHealth()/2; i++) {
                    toPlayer = toPlayer + "❤";
                }
            }
            ChatColor prefix;
            if(toPlayer.length() > 7)
                prefix = ChatColor.GREEN;
            else if(toPlayer.length() > 4)
                prefix = ChatColor.YELLOW;
            else
                prefix = ChatColor.RED;
            to.sendMessage("Health: "+prefix+toPlayer);
        }
    }