吴裕雄--天生自然python编程：turtle模块绘图（2）
#彩色螺旋线 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) turtle.done()