# Tk_wavy_grid_patterns.py

# Tk_wavy_grid_patterns.py

import math
import time
from tkinter import *
import random

root = Tk()
width,height=680,680
root.geometry("%dx%d+-10+0"%(width,height))
canvas = Canvas(root,width=width, height=height, background="yellow" )
canvas.grid()

m = 10
n = 10
d = 20
r = 20
p = 60
color = 'blue'

px = 50
py = 50

k = 1
angles = 360.0 / (m*n)
spots = []
for i in range(m):
    for j in range(n):
        x = px+(i*p)
        y = py+(j*p)
        spots += [[k,x,y]]
        k += 1
0
amount = len(spots)
while 1:
    canvas.delete('all')
    for i in range(amount):
        j,x,y = spots[i]
        angle = j * angles
        u = r * math.sin(angle*math.pi/180)
        v = r * math.cos(angle*math.pi/180)
        k = (j+1-(i*0.03))%amount
        spots[i] = [k,x,y]
        x += u
        y += v
        canvas.create_oval(x, y, x+d, y+d, fill=color, outline=color)
    canvas.update()