# Tk_after.py

# Tk_after.py

from Tkinter import *
import random
root = Tk()

h = 360
w = 640
root.geometry('%dx%d+10+10'%(w,h))

objs = []
colors='red orange yellow green cyan blue purple goldenrod khaki grey black'.split()
c=colors[:]
def removeobjs():
    if len(objs) > 0:
        canvas.delete(objs.pop(random.randrange(len(objs))))
#
def randomobjs():
    w2 = (random.randrange(200))+10
    h2 = (random.randrange(270))+50
    w3 = (random.randrange(200))+(w-210)
    h3 = (random.randrange(270))+50
    if not c: [c.append(z) for z in colors]
    objs.append(canvas.create_line(w2, h2, w3, h3, width=40, fill=c.pop()))

canvas = Canvas(root, width=w, height=h)
canvas.pack()
#
for z in '#'*10:
    randomobjs()
#
def after_loop():
    removeobjs()
    randomobjs()
    root.after(150, after_loop)
after_loop()

root.mainloop()