import random
import turtle
p=turtle.Turtle()
p.speed(0)
turtle.colormode(255)
def mygoto(x,y):
p.penup()
p.goto(x,y)
p.pendown()
def zhengf(radius):
if radius > 200:
return
radius +=1
p.color(random.randint(0,255), random.randint(0,255), random.randint(0,255))
p.circle(radius)
p.left(5)
zhengf(radius)
zhengf(50)