play accepts an optional options object as a first argument:
play {tempo: 200},
"GEC"
Options include:
tempo specifies a number of beats per minute.
The normal tempo is 120 beats per minute.wait can be set to false to start
a song and then proceed to the next animation without waiting for
it to finish. This can be used, for example, to have a turtle
play a song while it is simultaneously drawing; or to play two songs
at once.