The Ganzflicker is very cool. I only did it for 2 minutes, and it wasn't strong or overpowering. But I saw a) a blurry checkerboard, and b) ripples coming out

The Ganzflicker is very cool. I only did it for 2 minutes, and it wasn't strong or overpowering. But I saw a) a blurry checkerboard, and b) ripples coming out of the 4 corners of the screen. It turns out, 4 ripples coming out of the screen creates a blurry checkerboard! See https://www.falstad.com/ripple/ https://www.falstad.com/ripple/, set to "Example: Four Sources". That was exactly what I saw, but sped up, in red instead of green, and the ripples came out of the corners instead of east/north/west/south.