Gymnopedie 2  by Erik Satie. (Downloadable) 

This is the second of a set of three early minimalist pieces that are easy to learn. The Gymnopedies introduced chords and chord progressions that would go on to influence jazz and soft rock even though they were written in the late 1800's. Gymnopedie 1 and 3 are also available in the Piano by Ear library.