python有关turtle的用法例子

import turtle
import time
import datetime
turtle.setup(1000,800)
turtle.pensize(5)
starttime = datetime.datetime.now()
print(starttime)
for i in range(9):
    if i < 2:
        turtle.pencolor('purple')
        turtle.fd(200)
    elif i < 3:
        turtle.pencolor('purple')
        turtle.seth(120)
        turtle.fd(200)
    elif i < 4:
        turtle.pencolor('purple')
        turtle.fd(200)
    elif i == 4:
        turtle.pencolor('purple')
        turtle.left(120)
        turtle.fd(200)
        time.sleep(5)
    elif i == 5:
        turtle.pencolor('red')
        turtle.left(120)
        turtle.fd(200)
    elif i == 6:
        turtle.pencolor('red')
        turtle.right(120)
        turtle.fd(200)
    elif i == 7:
        turtle.pencolor('red')
        turtle.right(120)
        turtle.fd(200)
        time.sleep(5)
    else:
        turtle.pencolor('purple')
        turtle.left(120)
        turtle.fd(200)
m=time.gmtime()
print(time.strftime("%Y-%m-%d %H:%M:%S",m))
endtime = datetime.datetime.now()
print ((endtime - starttime).seconds)
turtle.done()