This is a simple tool I use to practice following music intervals. It was born out of discussion with several other musicians about short games to play to practice music theory and study for exams.
The game keeps track of a note on the twelve-note scale, and presents an interval. It always starts on C. You, the reader, are meant to keep clicking on the interval to get a new one while keeping track, mentally, of where the current keyboard note is.
For example, if the display shows the
interval
If at any point you lose track of where you are, click "Show Answer" to see a graphical representation of the keyboard with the current note highlighted.