#!/usr/bin/env python

r0 = 2

print('<svg width="600" height="600" xmlns="http://www.w3.org/2000/svg">')

cache = {}

def bool_r(x, y):
    if x in cache:
        if y in cache[x]:
            return cache[x][y]
    else:
        cache[x] = {}
    if x < 1:
        cache[x][y] = (y % 2 == 1)
    else:
        if y < 1:
            cache[x][y] = (x % 2 == 1)
        else:
            a = bool_r(x - 1, y)
            b = bool_r(x, y - 1)
            cache[x][y] = (a and not b) or (b and not a)
    return cache[x][y]


for x in range(128):
    for y in range(128):
        cx = r0 + x * r0 * 2
        cy = r0 + y * r0 * 2
        if bool_r(x, y):
            print(f'<circle cx="{cx}" cy="{cy}" r="{r0}" style="fill:blue;"></circle>')

print("</svg>")