#spin loop--white ball spins in orbit.  python 11
import random
import time
import math
from Tkinter import *
frmMain = Tk()
myCanvas = Canvas(width=400, height=400, background="orange")

degrees = 270
for i in range(200):
    xpt = 200 + int(100 * math.cos(degrees * math.pi/180))
    ypt = 200 + int(100 * math.sin(degrees * math.pi/180))
    
    myCanvas.create_oval(xpt,ypt,xpt+25,ypt+25,fill="white",outline="white")
    myCanvas.pack()
    myCanvas.update()
    time.sleep(0.1)
    myCanvas.create_oval(xpt,ypt,xpt+25,ypt+25,fill="orange",outline="orange")
                         
    degrees = degrees + 10


myCanvas.pack()
frmMain.mainloop()