Random concentric circles

Hello, i’m fairly new to grasshopper, and I’ve been trying to create random concentric circles, but they are all the same, is there a way to make every circle different? and why are the first circles smaller than the rest?

Thanks in advance

if random seed is the same outputs will be the same, use another random to generate random integer. And try to not show that you use a pirate version of Rhinoceros.

random_concentric_circles.gh (11.3 KB)