Creating a realistic and natural looking water flow is still one of the biggest challenges in the world of animation. Check this amazing attempt by NVIDIA, it truly is mind-blowing.
First I will show you the easiest way in Photoshop to create even, concentric circles and after we will ad an inverted text to make it look hypnotic in a groovy kind of a way.
Back in the days of Soviet Union, when there was no Photoshop available and space race was at its peak amazing and beautifully crafted propaganda illustrations were being created.