This sample file shows how you can recreate this classic Japanese circle pattern using multi-level repeater patterns and applying a color gradient to set the color of the repeated circles.
It also serves as an example of how you can work with creating seamless patterns and use the pattern repetition preview mode to see your pattern tile live.
There is also a step by step video on YouTube explaining how this pattern was created: Making a Seigaiha Japanese circle pattern in Paragraphic