Makes the tempo (speed of a piece of music) faster or slower by the amount you say.
music.changeTempoBy(20)
This function only works on the @boardname@ and in some browsers.
bpm
is a number that says how much to change the bpm (beats per minute, or number of beats in a minute of the music that the @boardname@ is playing).
This program makes the music faster by 12 bpm.
music.changeTempoBy(12)
This program makes the music slower by 12 bpm.
music.changeTempoBy(-12)