Simple Tree-Layout

[Benjamin Aaron Degenhart <b.degenhart.study AT gmail.com>]

Hello there,

graphstream seems great, I'd like to use it! 

Unfortunately I am failing (despite searching around) at the simple task to create a tree-layout in an example: https://gist.github.com/benjaminaaron/6f95c3dca98c124acd15

I would be grateful for some guidance as to what I need for the result to be a hierarchical layout and not the default one. 

Also is there a way I can shorten or avoid the animation and have the layouted graph immediately? 

Greetings from Munich, Germany,

Benjamin