实验八

from turtle import*
setup(800,600)
speed(0)
pencolor('pink')
n=10
for i in range(n):
        for j in range(2):
                circle(80,90)
                left(90)

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

from turtle import*
setup(800,600)
bgcolor('black')
pencolor('white')
speed(0)

angle=0
size=2
n=30
for i in range(n):
        for j in range(4):
                fd(size)
                angle+=91
                seth(angle)
                size+=5


hideturtle()
done()

from turtle import*
setup(800,600)
bgcolor('black')
pencolor('white')
speed(0)

angle=0
size=0
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 moveto(x,y):
    penup()
    goto(x,y)
    pendown()
setup(800, 600)
def rect(wide,height,rgb='red'):
    rgb = tuple(random() for i in range(3))
    color(rgb)
    for i in range(2):
        begin_fill()
        fd(wide)
        left(90)
        fd(height)
        end_fill()
        left(90)
for i in range(20):
    moveto((9 - i) * 10, 0)
    rect(10, 20)
hideturtle()
done()