python中如何给图形填充颜色

import turtle as t

import random as r

def pink():

    color = (1, r.random(), 1)

    return color

def randomrange(min, max):

    return min + (max- min)*r.random()

def moveto(x, y):

    t.penup()

    t.goto(x, y)

    t.pendown()

def heart(r, a):

    factor = 180

    t.seth(a)

    t.circle(-r, factor)

    t.fd(2 * r)

    t.right(90)

    t.fd(2 * r)

    t.circle(-r, factor)

t.setup(800, 800, 200, 200)

t.speed(9)

t.pensize(1)

t.penup()

for i in range(20):

    t.goto(randomrange(-300, 300), randomrange(-300, 300))

    t.begin_fill()

    t.fillcolor(pink())

    heart(randomrange(10, 50), randomrange(0, 90))

    t.end_fill()

moveto(400, -400)

t.done()