Chords for SEVENTEEN - CAMPFIRE & CLAP(w/CARAT), 세븐틴 - 캠프파이어 & 박수(w/CARAT) @2017 MBC Music Festival (). Spark is the smartest and most interesting app to learn and enjoy playing guitar. Spark is an all-around app for beginners and advanced players to learn any song with chords or master new skills with hundreds of lessons and games in Spark.