Staff Writer Over 45 cars gathered outside the Helling Branch of the Nevada County Library in a public display of appreciation for the community on Valentine’s Day Sunday. The motorcade, organized by local public radio station KVMR, proceeded down Broad Street, through Nevada City and into Grass Valley, with participants honking and waving at pedestrians. William Wallace of downtown Nevada City decorated his white utility truck with pink and red heart balloons. Wallace has been chief of security for KVMR’s Celtic Music Festival since the festival began 13 years ago. William Wallace of downtown Nevada City, who participated in the event driving his white pickup truck, has been chief of security for KVMR’s Celtic Music Festival.