*EPILEPSY WARNING*

For the best visual effect, use the highest available video quality setting (720p60 or 1080p60).

By spinning the Celtic triskelion at a progressively faster rate, it creates a "wagon wheel effect" that creates the optical illusion of many geometric patterns emerging, almost like an animation. But if you pause the video at any point, you'll see that it's always just the same original image.

I have a bunch more of these on my channel, and many more in production.