Crappy ripoff of FizzyText (seen here, source here, my attempted explanation here) in which collision-detection (of particles with letterforms) is used to slow the particles down instead of engorge them. And then a third canvas is introduced which isn't cleared every frame, so the particles leave translucent streaks.
It looks like an inkjet printer!!
Refresh many times for streaky imperfect printing!
xxxxxxxxxx<html><head><style> canvas { position: absolute; top: 0; left: 0; }</style><title>StreakyText</title><script src='main.js'></script><script> window.onload = function() { var streakyText = new StreakyText('Streaky Text!'); };</script></head><body><div id='streakytext'></div></body></html>