I've been to an exhibition at Beyeler and saw this frescoe, just coloured tiles..... BUT as I wanted a photo of the entire fresco I've used the panorama of my iPhone to discover a huge porn scenery....
I don't dare posting the entire frescoe, so here just a small part of it ! I hope it's not choking...if you say it is I will delete it ! I promise..
The artist's name is Tobias Rehberger.