python基础-斐波那契数列绘图（turtle）

神奇的斐波那契数列，0,1,1,2,3,5,8,13,21····

 

import turtle as t

def draw_fibonacci():
    t.speed(11)
    t.colormode(255)
    t.pensize(1)
    t.hideturtle()
    flag = 1
    for j in range(60):
        t.penup()
        t.home()
        t.left(3 * j)
        t.pendown()
        s = 1
        n1, n2 = 0, s
        red, g, b = 0, 0, 0
        for i in range(13):
            if i == 0:
                r = s
            else:
                r = n1 + n2
                n1 = n2
                n2 = r

                # red = g
                # g = b
                # b = red + g
            t.color(red, g, 255-r)
            t.circle(r, 90*flag)
        flag=-flag
            # t.circle(1)
    print("完成")
    t.done()

if __name__ == '__main__':
    draw_fibonacci()