Multi-Colored Waves

I'm continuing to experiment with the technique I tried a week ago. This is such a trial and error kind of thing. I have no way of predicting the final outcome, so I take a lot of three burst photos and wait until Photoshop revels the result. I found out today that the longer the shutter is open, the more color in the eventual photo. Not certain that is exactly what I am after, might have to try some with a fast shutter speed next.