python 的一个绘图代码

1 import turtle
2 import time
3 turtle.pensize(2)
4 turtle.bgcolor("black")
5 colors=["red","yellow","purple","blue"]
6 for x in range(400):
7     turtle.forward(2*x)
8     turtle.color(colors[x%4])
9     turtle.left(91)

效果图如下