Drawing circles with loops (solved)

[Villr]

Hi everyone, I'm currently trying to make a program to draw circles with loops. The problem I'm is, I have to make it so every circle drawn would be 10 pixels bigger than the previous one. I'm currently stuck on what to do.

Here is my code:

import turtle
a = 1
size = 20
i=0
for i in range(0,200,10):
    turtle.bgcolor("green")
    turtle.color("blue")

    while a <= 5:
        a += 1
        turtle.penup()
        turtle.goto(0,-size-i)
        turtle.pendown()
        turtle.circle(size+10)
        size += 10

Edit: Sorry about that guys, I had a brain fart and managed to find a easier way to do it.