@nuxi @amszmidt You can't really say nobody, when I just told you about a much newer one.
NetLOGO 3D does an amazing job at showing flocking algorithms. So you don't have to download the 3d NetLOGO app, here is a web app running the 2D version. I bet you can't do that in your grandpa's LOGO. And you can do it in 3D with the app... You would be blown away to try it, even on fairly modest equipment. Most of the 3D alife (artificial life) models you've ever seen are coded this way.
Click SETUP and then GO.