# Tk_line_rotate_patterns.py

# Tk_line_rotate_patterns.py

from math import cos,sin,pi,radians
import random

r=random.randint

try:
    import tkinter as tk
except:
    import Tkinter as tk

root=tk.Tk()
root.title("Tk Line Rotate Patterns")

ww=640
hh=640

mid=(ww+hh)/4

canvas=tk.Canvas(root,width=ww,height=hh)
canvas.pack(fill="both",expand=True)


class Cv(): 0
cv=Cv()
cv.color='red'
COLORS = 'red darkorange yellow green blue purple'.split()
cv.a=1
cv.b=1
cv.a2=1
cv.b2=1
cv.o360=360
cv.angle2=0
cv.count=0

STEP=25

def mark():
    a=cv.a*STEP
    b=a+(cv.b*STEP)
    c=int(360.0/cv.o360)
    for angle in range(0,360,c):
        x0=mid+cos(radians(angle))*a
        y0=mid+sin(radians(angle))*a

        angle=(angle+cv.angle2)%360
        x1=mid+cos(radians(angle))*b
        y1=mid+sin(radians(angle))*b

        canvas.create_line(x0,y0,x1,y1,width=2,fill=cv.color)

def tick():
    canvas.delete(tk.ALL)
    random.shuffle(COLORS)
    colors2 = COLORS[:]

    for z in range(3):
        cv.b=r(1,15)
        cv.a=r(1,16-cv.b)
        cv.angle2=r(0,360)
        cv.o360=r(3,50)
        cv.color=colors2.pop()
        mark()
    canvas.after(500,tick)

tick()

tk.mainloop()