Chords for 棉花糖 katncandix2 - 馬戲團公約 Circus Convention 自製MV（公視「他們在畢業的前一天爆炸」 片頭曲） (). 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.