实验8

from turtle import *

def square(size=50, rgb='orange'):
    '''绘制正方形
    参数size指定边长
    参数rgb指定画笔颜色
    如果没有给参数，采用默认值
    '''
    pencolor(rgb)
    for i in range(4):
        fd(size)
        left(90)


def main():
    setup(800, 600)
    speed(0)

    n = 10
    for i in range(n):
        square(80)
        left(360/n)

    hideturtle()
    done()


if __name__ == '__main__':
    main()

from turtle import *

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

n = 10
for i in range(n):
    # 绘制一片花瓣
    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 = 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 move_to(a, b):
    penup()
    goto(a, b)
    pendown()

def get_rgb():
    list = []
    rgb = tuple(random() for i in range(3))
    while rgb in list:
        rgb = tuple(random() for i in range(3))
    list.append(rgb)
    return rgb

def draw_rectangle():
    begin_fill()
    rgb = get_rgb()
    color(rgb, rgb)
    for i in range(2):
        fd(20)
        left(90)
        fd(70)
        left(90)
    end_fill()

setup(800, 600)
speed(0)

for i in range(20):
    move_to(-20*10+20*i, 0)
    draw_rectangle()

hideturtle()
done()