FizzyText ripoff, variable flow chameleon

Crappy ripoff of FizzyText (seen here, source here, my attempted explanation here).

Extremely similar to the original FizzyText, except kinda hacked apart and put together more sloppily. Differences:

• Particles pick up the color of the underlying (invisible) canvas. (Could just as easily be used with images or whatever.)
• Particles slow down while they're atop the letterforms.
• The flow field oscillates between two different flow fields, giving the appearance of the letters periodically being blown apart and re-cohering.
• I'm still not randomly seeding the noise generators correctly, so...