There is no limit to the number of rings that can be defined. In the example below we set a policy with two rings, the small inner ring has a radius of 40 units around the point of focus, updates are sent every 100ms and a constant
gradient is set, this means that updates will be sent at 100ms intervals irrespective of where in the ring an entity is. A second ring is defined extending to a radius of 80 units with an update frequency of 500ms. In the second ring a linear
gradient is used. This means that at the outer edge of the ring entitles will be updated every 500ms, but at the inner edge they will use the update frequency of the inner ring, in this case 100ms with a linear increase in between, so an entity 60 units away from the focus point would issue updates every 300ms