Will Tizard ContributorIn the Icelandic musical adventure “12 Hours to Destruction,” writer-director Nanna Kristín Magnúsdóttir revels in a wholeheartedly youthful story of a school band battling nasties to save their dance.The film, part of the Finnish Film Affair’s Nordic Selection of works in progress being held this week in Helsinki, is an ambitious project, produced by one of Iceland’s leading players, The Icelandic Film Company/Kisi Production, founded in 1991 by Julius Kemp and Ingvar