Still discovering the vfx optical glow plugin [01-11-19], I was practicing with TrapcodeTAO the wiggle expression to control paths frequency. Thanks to Dan Ebbert's expression guide [http://www.motionscript.com/articles/speed-control.html] I was able to use his patch of code and that allowed me to keyframe the frequency value in a wiggle expression in the appropriate manner. If you need the project file please DM me on twitter. OG gif | 640x640