Circles different Radius

Hi, I have an easy question but I am quite new in grasshopper and I dont get it.
I just one to adjust the size of the circles some how in the image, there is a sufarce and I have some points that start (for example) from Radius=1 till variable Radius 3-5.
How can I do this? with doble domain?

Look at the series component or search attractor on this forum.