Students from schools across South Carolina perform "While I Breathe, I Hope" during a 2021 virtual choir performance created by Craig Allen and the South Carolina American Choral Directors Association. (Photo courtesy of Craig Allen, a Winthrop University adjunct instructor of music)COLUMBIA — South Carolina’s new choral anthem puts the state’s nearly 250-year-old motto to music with a uniting message of hope. The designation, following a decad…