content

public void playArc(final Player player){

        new BukkitRunnable() {

            double radius = 5;
            double angle = 0;
            double back = (Math.toRadians(360)) / 5;
            Location loc = player.getLocation();

            @Override
            public void run() {

                double t = 0;
                for (int i = 1; i < 5; i++){
                    t+= Math.toRadians(360) / 5;
                    double x = radius * Math.cos(angle + t);
                    double z = radius * Math.sin(angle + t);
                    loc.add(x, 0, z);
                    ParticleEffect.FLAME.display(UtilVector.getVector(loc, player.getLocation()).multiply(0.75), 0.1F, loc, 1000D);
                    loc.subtract(x, 0, z);
                    x = radius * Math.cos(back + t);
                    z = radius * Math.sin(back + t);
                    loc.add(x, 0, z);
                    ParticleEffect.FLAME.display(UtilVector.getVector(loc, player.getLocation()).multiply(0.75), 0.1F, loc, 1000D);
                    loc.subtract(x, 0, z);

                    angle += Math.toRadians(360) / 5 / 20;
                    angle -= Math.toRadians(360) / 5 / 20;
                }
            }
        }.runTaskTimer(getPlugin(), 0L, 1L);
    }