public Location[] circleFrom(Location l){
    List<Location> returnList = new ArrayList<Location>();
    for(int x = 2; x>=-2; x--){
        for(int z = 2; z>=-2; z--){
            for(int y = 0; y>=1; y++){
                if(!(Math.abs(z)==1&&x==0)||!(Math.abs(x)==1&&z==0)||x!=z){
                    returnList.add(new Location(l.getWorld(), l.getX()-x, l.getY()+y, l.getZ()-z));
                }
            }
        }
     }
     return returnList.toArray(new Location[returnList.size()]);
}

@EventHandler
public void gandalf(PlayerInteractEvent e) {
if(e.getAction()!=Action.RIGHT_CLICK_AIR||e.getAction()!=Action.RIGHT_CLICK_BLOCK)return;
Player p = e.getPlayer();
Action a = e.getAction();
if (p.getItemInHand().getType() == Material.STICK) {
        Location location=p.getLocation();
        for(int i = 0; i<circleFrom(location).length; i++){
            Location l = circleFrom(location)[i];
            Material changeTo = Material.SPONGE;
            new BukkitRunnable(){
                public void run(){
                    l.getBlock().setType(changeTo);
                }
            }.runTaskLater(this, i*2);//i*20 = (i) seconds
        }
        new BukkitRunnable(){
            public void run(){
                for(Location l : circleFrom(location)){
                    l.getBlock().setType(Material.AIR);
                }
             }.runTaskLater(this, 3.8);//2 seconds + 18 blocks that each takes 0.1
        }
    }
}