实验八

from turtle import *
def square(size=50, rgb='pink'):
    '''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
setup(800,600)
#颜色随机生成
 # 随机生成rgb颜色三元组

def rect(size,height,rgb=''):
    color(rgb)
    begin_fill()
    for i in range(4):
        fd(size)  # 向前
        left(90)  # 向左转的角度
        fd(height)
    end_fill()

penup()
goto(-200, 0)
pendown()

for i in range(20):
    rgb = tuple(random() for j in range(3))# 随机生成rgb颜色三元组
    rect(20,50,rgb)
    fd(20)

hideturtle()
done()