Unity Temple Restoration Foundation will present its final public performance at the end of October, days before the 50-year-old organization sunsets.The performance, called “The Coming of Light," is a composition for oboe, baritone and a string quartet, and will feature the Avalon String Quartet and singer Dorian McCall, oboist Andrew Nogal.The piece was commissioned in 2009 to honor the centennial of Unity Temple’s dedication by UTRF and The Chicago Chamber Musicians along with Winsor Music, Inc. The score and concert were underwritten by Sidney K. Robinson of Oak Park.A second modern composition by Igor Santos called “as light becomes form,” will be performed by Duo Diorama. The composer describes it as a “musical response to Frank Lloyd Wright’s Unity Temple, the building which inspired the work, and where the first performance took place.”