import turtle as t

import random

t.screensize(768,1024)

t.speed(0)

t.bgpic('bg.gif')

for i in range(100):

bj = random.randint(1,384)

t.penup()

#移到圆心位置

t.goto(0,150)

#前进半径距离

t.forward(bj)

#左转90

t.left(90)

t.pendown()

r = random.uniform(0,1)

g = random.uniform(0,1)

b = random.uniform(0,1)

t.pencolor(r,g,b)

#t.color(r,g,b)

t.circle(bj,60)

t.left(random.randint(0,360))