Use the sliders to change the max wind speed and how often the wind changes. My favorite is a max speed of 4 with 1 second between changes. It gives it the feel of an imminent storm moving in.
Credit to godbisset for almost all of the real work. Update: Added "dance party" mode, which makes the wind go to the music (sort of), but also makes the scripts a lot less readable. Oh well, I couldn't help it... I challenge someone to add random leaves blowing by. ;-) Credit to The Sherman Brothers and the "singer who shall not be named" for the brilliant song.