LEWISTON — Original compositions for guitar and fiddle performed by Greg Boardman will fill this week’s program at the Oasis of Music, Wednesday, Sept.27. Written in a traditional Northeast folk style, these instrumental  tunes commemorate various people, events and ruminations in this musician’s life.   The Oasis of Music is at Trinity Church, 247 Bates St. from 12:30-1.  Admission is always free.  FMI: call 344-3106.