3.实验任务3

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()

4.实验任务4

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()

5.实验任务5

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()

6.实验任务6

from turtle import *
from random import random
shape('turtle')
def moveto(x,y):
penup()
goto(x,y)
pendown()
i=0
while i<=9:
speed(0)
rgb = tuple( random() for i in range(3) )
color(rgb)
begin_fill()
fd(10)
left(90)
fd(50)
left(90)
fd(10)
left(90)
fd(50)
end_fill()
left(90)
fd(10)
i+=1
moveto(-10,0)
i=0
while i<=9:
#speed(0)
rgb = tuple( random() for i in range(3) )
color(rgb)
begin_fill()
fd(10)
left(90)
fd(50)
left(90)
fd(10)
left(90)
fd(50)
end_fill()
i+=1
left(90)
moveto(-10*(i+1),0)
hideturtle()
done()

实验总结：实验6完成的十分牵强