These are excercises to help your intonation and finger positioning. When you start an exercise then a note will appear on the staff. You play the note using the fingering shown in the text. Then the app will play that note and you can adjust your fingers accordingly. Then a new note will be shown. etc.
You can adjust the following sliders:
timeToStart – # of seconds before the exercises start.
waitTime – # of seconds between notes.
timeLength – # of seconds each note plays.