Python Turtle Graphic Design #6

 Python Turtle Graphic Design #6

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Source code:

import turtle as t

import colorsys as cs

from math import sin,cos,radians

t.setup(640,640)

t.bgcolor('black')

t.tracer(300,0)

t.hideturtle()

N = 18 # number of petals

R = 250 # radius

STEP = 3

A = 360/N

A2 = A/2

B = 180-(90+A2)

D = 90-B

t.lt(90)

for j in range(R,0,-STEP):

    XR = cos(radians(A2))*j

    YR = sin(radians(A2))*j

    for i in range(N):

        h = i/N

        l = j/(R*1.75)

        s = 1

        t.color(cs.hls_to_rgb(h,l,s))

        t.begin_fill()

        t.rt(A2)

        t.fd(XR)

        t.circle(YR,180+D*2)

        t.fd(XR)

        t.end_fill()

        t.rt(180-A2)

t.done()