from turtle import *
import random
tracer(False)#跳过绘画过程
bgpic("dot.png")
setup(1200,800)
t=Pen()
t.ht()#隐藏画笔
t.penup()
nei=0
total=0
t2=Pen()
t2.ht()
t2.penup()
t2.goto(380,-50)
while True:
    x=random.randint(-200,200)
    y=random.randint(-200,200)
    t.goto(x,y)
    if t.distance(0,0)<200:
        t.dot(5,'yellow')
        nei+=1
    else:
        t.dot(5,'magenta')
    total+=1
    pai=4*nei/total
    t2.clear()
    t2.write("{}\n\n{}\n\n{}".format(nei,total,round(pai,4)),font=("宋体",25,'bold'))
    update()