用python随机画泡泡

from turtle import*
import random
speed(0)
def drawcicle(a,x,y):
    up()
    setposition(x,y)
    down()
    b=random.randint(0,1)
    if b==1:
        begin_fill()
        circle(a)
        end_fill()
    else:
        circle(a)
for i in range(100):
    x=random.randint(-180,180)
    y=random.randint(-180,180)
    a=random.randint(5,20)
    r=random.randint(40,250)
    g=random.randint(40,250)
    b=random.randint(40,250)
    colormode(255)
    color(r,g,b)
    drawcicle(a,x,y)