（每一拍 往下弹拨（or刷弦）一次, 当看到萤光标示的和弦时就换该和弦）
happy [C] birthbay to [G7] you,
Happy birthday to [C] you,
Happy [C7] birthday, dear [F]麦克, Happy [C]Birthday [G7]to [C]you——
视频演示
