Python Turtle Graphics Drawing - Golden Ration

 Golden Ration - Python Turtle Graphics

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Source code:

import turtle as t

t.setup(640,640)

t.bgcolor('white')

G = 1.618

R = 1

t.speed(10)

t.up()

t.fd(115)

t.rt(90)

t.fd(60)

t.rt(90)

t.down()

for i in range(13):

    t.pensize(1)

    t.color('gray')

    for j in range(4):

        t.fd(R)

        t.lt(90)

    t.pensize(2)

    t.color('black')

    t.circle(R,90)

    R *= G

t.done()