This example shows how the extra music GIFs can be used.
Piano (keyboard) players are assumed to be able to play more than one note at once. It would take too many GIFs to cover all possible combinations of notes and durations. So I have only added pairs of notes of the larger durations.
Song sheets often have guitar chord notation added. This is because the guitar is quite easy to play and more portable than a piano! It is possible to merely add the names of chords as text in a table row above the tune. However, inexperienced players may find the standard diagrams a helpful reminder.