Challenge to classical music composers - let's make this - half improvised "piano concerto"

Challenge to classical music composers - let's make this - half improvised "piano concerto"  

Let's make this a half improvised "piano concerto" - with composed symphony orchestra background.

1. You compose to it orchestra background and record it to this soundtrack. Or group of instruments like violin, viola, cello etc.

2. You send it to me jussi.vaarala@gmail.com - and I listen it.

3. If I can accept it - I add it to Youtube

4. I add you also to my copyright company Teosto in Finland 50% composer. And if to that version comes copyright payments you get half of it.

I did not inprovise this piece with idea that there could be added composed orchestra part - but I got this idea now.

Because idea doing in this way is in general very interesting.

I think I can improvise later keeping this aspect in mind.