Leonardo
Thank you very much for the answer.
I read the section ‘Research Survey’.
I assume you are referring to this with the term ‘little facilities’ and ‘sequence block’.
OK, I think that’s the real solution for the rotation within the mosaic. Great.
(I tried to rotate through the tiles with a DragScript 
).
And I think a multi target DragScript isn’t complicate anymore with this solution.
Thank’s a lot.
Hans