private void suckEntityInNetwork(Entity closest) {
   if (!pipeNetwork.contains(closest)) {
     if (type == START) {
       pipeNetwork.addEntity(closest);
     }
   }
 }
  public void update() {
    EntitiesLayer layer = ((EntitiesLayer) getLevel().getLayer(getLayer()));
    if (pipeNetwork != null && pipeNetwork.invalid) {
      layer.removeEntity(this);
    } else if (pipeNetwork == null && type == START) {
      pipeNetwork = PipeNetwork.create(this);
      if (pipeNetwork == null) layer.removeEntity(this);
    } else if (pipeNetwork != null && type == START) {
      ArrayList<Entity> closestEnts = layer.getClosestEntities(this, 24);
      for (Entity closest : closestEnts)
        if (closest != null) {
          suckEntityInNetwork(closest);
        }
    }

    motionX = 0;
    motionY = 0;
  }