python绘图四叶草

import turtle

def draw_shapes():

    window = turtle.Screen()

    window.bgcolor("red")

    flower = turtle.Turtle()

    flower.speed(10)

    flower.shape("arrow")

    flower.right(45)

    for i in range(1,37):

        for j in range(1,5):

            draw_circle(flower,i,"green")

            flower.left(90)

    flower.right(45)

    flower.color("green")

    flower.forward(500)

    window.exitonclick()

def draw_circle(circle,radius,color):

    circle.color(color)

    circle.circle(radius)

draw_shapes()