Each block in the diagram represents a beat, and chord labels indicate modulations within the song. As the song plays, the cursor highlights the current beat position, guiding you on which chord to play at that moment. When you encounter an empty block, it signifies that you should continue playing the previous chord. You can enhance your practice and performance by downloading digital or printable chord sheets. These sheets include chords, lyrics, and chord sheets with lyrics, providing a convenient resource for musicians.