#!/usr/bin/env python
# coding: utf
'''
'''

from turtle import *

reset()
w,h=screensize()
w=h=min(w,h)
screensize(w,h)

speed("fastest")

def pie(r):
    forward(r)
    down()
    fill(True)
    left(90)
    circle(r,180)
    left(90)
    fill(False)
    up()
    forward(r)

colors="red","orange","yellow","green","cyan","blue","purple"
for i,c in enumerate(colors+("white",)):
    color(c)
    pie(w-w*i/10)

exitonclick()