How would you describe this piece does this piece have a subject matter does it have content explain your answer

This piece is an abstract. It is an unknown to the eye and without explanation, you can't tell what exactly it is looking at. At first glance to many, the piece might look like a collect paint which has been lobbed and stroked without careful planning which is which is across the canvas.
There is no clear subject matter and no decision made which could be universal. There is a content. By look at this piece, it doesn't create feelings or may be different for each person who views the piece and also for the artist himself.

His contribution to the orchestral genre mainly lies with foreshadowing ideas that are to come like the emergence of the classical symphony, the cadenza for a keyboard, and paired instrumentation;