实验8

from turtle import *
def square(size=50,rgb='gold'):
    pencolor(rgb)
    for i in range(4):
        fd(size)
        left(90)
setup(800,600)
speed(0)
n=10
for i in range(n):
    square(80)
    left(360/n)
hideturtle()
done()

from turtle import *

setup(800, 600)
pencolor('pink')

n = 10
for i in range(n):
    for j in range(2):
        circle(80, 90)
        left(90)

    right(360/n)
    speed(0)
hideturtle()
done()

from turtle import *

setup(800, 600)
bgcolor('black')
pencolor('blue')
speed(0)

angle = 0
size = 2

n = 10
for i in range(n):
    for j in range(4):
        fd(size)
        angle += 72
        seth(angle)
        size += 5
hideturtle()
done()

from turtle import *
from random import random
def rect(k,h,rgb=''):
    color(rgb)
    begin_fill()
    for i in range(4):
        fd(k)
        left(90)
        fd(h)
    end_fill()
    speed(0)
setup(800,600)
penup()
goto(-200,0)
pendown()
for i in range(20):
    rgb = tuple(random() for j in range(3))
    rect(20,80,rgb)
    fd(20)
    speed(0)
hideturtle()
done()