Submitted for your pleasure one piano rag "Bethena" A Concert Waltz by Scott Joplin (1868 - 1905). PDF file.
I made a midi file using an MC-50mrkII quite a few years ago for a project exam in music history / theory. (Proud to say I received an A.) Anywazzoo, Here it is for you if you want. I can send it to you just PM me with your email.
This is a rather fun piece to work with.
If I can find my file I will send it along with the pdf.
OR! You can go to www.mutopiaproject.org and get all the free music and midi's you want!