Abstract Thursday... Shapes

This is serigraph from H.H. Zimmermann, a Duisburger artist.
This is an interpretation of a square.

I followed Inge's advice and looked up 'abstract photography' on google and found images like this, and I thought, oh, I have one of those here at home (in a box), actually I have a few pieces of his work.
My husband at the time had a new office in Duesseldorf with lots of wall space and we had this artist friend who had a lot art work in a storage space. We decorated the office and it was a success, it looked like a gallery. Of course, when it came time to gave these back to him, we purchased some of the art work... and we moved to the USA.