A take on the classic horizontal oscilloscope + ‘trails’ ideas, but with two LFOs. One LFO sets the rate of change of the size of the Trails. The other LFO sets the rate of change of the size of the elements that make up the oscilloscope. Get the cool effect by turning ‘Persist’ on. The two LFOs are a little silly together, but what the heck! : )

Knob1 = Oscilloscope Shape & Size Selector. 3 divisions: lines, circles, lines+circles. Within each division, the LFO rate is set – turning to the right will increase the LFO frequency.
Knob2 = ‘Trails’ LFO rate of change – turn on “Persist” to see it!
Knob3 = ‘Trails’ Opacity
Knob4 = Foreground Color – 8 positions
Knob5 = Background Color