First of all, we need a cuboid object which will define bounds of that area. This can be done with simple code as

 CuboidArea cuboid = new CuboidArea(cornerLocation1, cornerLocation2);

Where corner locations as basic bukkit Location objects. Which 2 corners you will provide, doesn’t matter. 

Next, lets create actual visualization of this cuboid.

svVisualCuboid cuboid = new svVisualCuboid(player, cuboid , AreaType.BEACON);

Player object will be needed to get some of the options for that visualization, like update rates and so on.

AreaType is optional, but in general, it will define from which visualization we want to take particle effects.  

And in genral you are done, you can run 

cuboid.startRender();

Which will start drawing particles in a defined area for the defined player. But lets do some extra things about it.

Lets hide the bottom and top parts.

cuboid.addHiddenSide(CuboidSide.Bottom);
cuboid.addHiddenSide(CuboidSide.Top);

So in this case you will only see walls of that visualization.

For performance reassons particle locations are caculated only once, to avoid constant calculations when we dont need. So at this point if bounds are bigger then your view range, you will not see the entirety of it. So lets fix it

cuboid.addUpdateType(svUpdateType.move2blocks);

This will recalculate visible points after you move 2 blocks. Full list of posible update triggers can be found belowe.

Now, what we should do if we would want to stop visualization if something happens? Not a problem. 

svVisualCuboid cuboid = new svVisualCuboid(player, new CuboidArea(start, end), AreaType.BEACON) {
@Override
public boolean isValid() {
  if (center.getBlock().getType() != Material.BEACON)
	return false;
    return true;
  }
};

This code will force a check before each update cycle, and if it fails, visualization stops. In this example it will stop if target block is no longer a beacon.

So what if you would want to change something when update event triggers? Like in example if you would want to change cuboid bounds.

svVisualCuboid cuboid = new svVisualCuboid(player, cuboidArea, AreaType.WEPASTE) {
  @Override
  public void onUpdateEvent() {
      cuboidAreas.clear();
      CuboidArea clone = cArea.clone();
      clone.getLowLoc().add(player.getLocation().getBlockX(), player.getLocation().getBlockY(), player.getLocation().getBlockZ());
      clone.getHighLoc().add(player.getLocation().getBlockX(), player.getLocation().getBlockY(), player.getLocation().getBlockZ());
      cuboidAreas.add(clone);
      calculateLocations();    
  }
};

This is the code used to show WorldEdit paste visualization which updates its location when player moves. So actions are quite simple, clear old cuboids, have a original one which can be cloned to avoid messing it up. Then update its locations, add to cuboid list and recalculate locations. Simple? Kind of.