Streaky Text II

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

In this one, there are actually three canvases:

• One to get collision-detection info from
• One that doesn't get cleared every frame, to show streaks
• One that gets cleared every frame, to show the moving endpoints

I set everything to the same color; the particles aren't picking up the color of what's underneath.