Problem with ParticleLIB

import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scheduler.BukkitRunnable;
import com.darkblade12.particleeffect.ParticleEffect;

public class main extends JavaPlugin implements Listener{

    @Override
    public void onEnable(){
        PluginManager plm = this.getServer().getPluginManager();
        plm.registerEvents(this, this);
    }

    double cos(double i){ return java.lang.Math.cos(i); }
    double sin(double i){ return java.lang.Math.sin(i); }

    //ParticleEffect.NAME.display(float offsetX, float offsetY, float offsetZ, float speed, int amount, Location center, double range);
    @EventHandler(priority=EventPriority.HIGH)
    public void onPlayerUse(PlayerInteractEvent event){
        final Player p = event.getPlayer();
        if(p.getItemInHand().getType() == Material.GOLD_SWORD){
            //=== PARTICLE ===//
            new BukkitRunnable(){
                double t = 0;
                double r = 1;
                Location loc = p.getLocation();
                @Override
                public void run() {
                    t = t + Math.PI/16;
                    double x = r*cos(t);
                    double y = r*sin(t);
                    double z = r*sin(t);
                    loc.add(x, y, z);
                    ParticleEffect.VILLAGER_HAPPY.display(0, 0, 0, 0, 10, loc, 1);
                    p.sendMessage(Double.toString(loc.getX()) + " | " + Double.toString(loc.getY()) + " | " + Double.toString(loc.getZ()));
                    loc.subtract(x, y, z);

                    if(t > Math.PI * 8){
                        this.cancel();
                        return;
                    }

                }
            }.runTaskTimer(this, 0, 1);




        }
    }

}