You might want to check out the tutorials on this page: http://www.hourences.com/tutorials/ Especially the Material Editor – Examples 1 tutorial, which mentions Panner.
Ahh :) finaly I made it! I don't find yet the logic of this red and green how is changing the position, nor of the A B output, but I guess I need to read more tutorials. Thank you JamesWild and all again for helping me out!