Compases por minuto

The program will play a tempo, like a metronome. You should try to guess how many beats per minute is played. Each button represents one tempo, and the program will only play in tempos that has a button with bold text. Right-click on buttons to change the status of a tempo.

Nota: o ritmo depende da función gtk timeout_add para reproducir o ritmo, así que non é moi preciso.