Makes trees into beats for use in music.
BeatTree.new([1]) # One whole note
BeatTree.new([1, 1]) # Two half notes
BeatTree.new([1, [1, 1]]) # One half note, followed by two quarters
BeatTree.new([1, 1, 1]) # Triplets
BeatTree.new([1, 1, 1, 1]) # Four quarters
# etc... You get it!
Specs. At some point.