Anyways, but what seven rings indicates to? Is it the seven oceans or seven continents? 
I already stated what it is.It's the 'Flower of Life', the basis of Metatron's cube.
Put simply, think of consciousness as being a single point and the circle around it being it's known universe. To gain a greater understanding, consciousness moves to the edge of the circle. The six circles represents the six points consciousness would need to move to, to broaden it's perspective. This is the Flower of Life. The Fruit of Life is an extension of this and the basis for Metatron's cube.
This is the pattern of creation and how everything in the universe came to be.
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It is a common symbol of many spiritual and religious teachings around the world. The Flower of Life has been found all over the world in many different religions. It is one of the oldest sacred symbols known to man. It is a geometrical shape that is made up of multiple overlapping circles of the same size.
http://www.collective-evolution.com/2013/12/10/the-secret-to-how-the-universe-works-lies-within-this-geometrical-pattern-what-is-the-flower-of-life/
https://www.youtube.com/watch?v=RHuvW7YaGjQ
https://www.youtube.com/watch?v=e3tcxY2aEzU