Circle of squares using turtle

import os
import turtle
os.chdir(r'D:\projects\wordpress\ex51')
os.getcwd()

def draw_square(some_turtle):
    for i in range (1,5):
        some_turtle.forward(200)
        some_turtle.right(90)

def draw_art():
    #Turtle Brad
    n=5
    brad = turtle.Turtle()
    brad.speed(10)
    for i in range(1,int(360/n)+1):
        draw_square(brad)
        brad.right(n)

draw_art()
turtle.mainloop()