Beethoven's Pastorale in F 1st Movement 111015 by BarryK
I was playing F blues and some interval or chord I played reminded my of this tune. I didn't know the name of it so I went to http://www.musipedia.org/flash_piano.html and played the partial melody on the piano in the web page and it found what I was looking for.
I then downloaded a piano arrangement (http://imslp.org/wiki/Special:ImagefromIndex/01057) and started working on a vibraphone arrangement. Turned out the Pastorale is also in F.
This is what I have so far.