This is not meant to be a complicated PoV scenario, but simple with 2 colors.
I want to wave/move a strip of LEDs on a stick, say, and give the appearance of 2 colors alternating (like lines) when waved or moved. But when the strip is still, you don't see the 2 colors... more like a summation of their values. I'm not talking shapes, images, or text, or anything that I assume needs positional feedback-just a strip alternating 2 colors. So, if you chose red and blue, a wave would show vertical lines of alternating red & blue, in the same axis as the strip (meaning all LEDs are same color), and not something like 'every other LED'.
What I lack is any idea as to which libraries (I'm using WS2812Bs), timings, or adjustments can be made to give this visual, or similar.
The Interwebs are packed with spinning globes and wands that draw images, but this is a far simpler, initial stepping stone. I am curious how Arduino code can alternate colors on the string (all colors change at once) fast enough, and what blink rates have been found to be effective, and even be kind to battery supplies.
Sorry for the painful attempt at explanation. I appreciate your patience.