引入turtle庫畫圖簡直無敵，之前用過MATLAB的plot函式，感覺這個更強大，有海量的第三方庫，簡直完美有趣

1.彩色螺旋線的繪製

import turtle 
import time 
turtle.pensize(2) 
turtle.bgcolor("black") 
colors = ["red", "yellow",'purple','blue'] 
turtle.tracer(False) 
for x in range(400):  
	turtle.forward(2*x)  
	turtle.color(colors[x % 4])  
	turtle.left(91) 
	turtle.tracer(True)
 

from turtle import * 
color('red', 'yellow') 
begin_fill() 
while True:
	forward(200) 
	left(170) 
	if abs(pos()) < 1:
		break 
end_fill() 
done()

3.五角星的繪製

from turtle import * 
fillcolor("red") 
begin_fill() 
while True:
	forward(200) 
    right(144)
    if abs(pos()) < 1:
    	break 
end_fill()
 

4.螺旋線繪製

import turtle 
import time 
turtle.speed("fastest") 
turtle.pensize(2) 
for x in range(100):
	turtle.forward(2*x)
	turtle.left(90) 
time.sleep(3)