#!/usr/bin/python
from pylab import *
x,y = 0,0
xs = [x]
ys = [y]
fnames = []
import time

tstart = time.time()
figure()
show(False)
for i in xrange(50):
    fname = "walk{:03d}.png".format(i)
    print fname

    t = 2*pi*rand()
    x += sin(t)
    y += cos(t)
    xs.append(x)
    ys.append(y)
    cla()
    plot(xs,ys)
    draw()

    savefig(fname)
    fnames.append(fname)
print time.time()-tstart

import subprocess, os
print "merging animation"
subprocess.check_call(["convert"] + fnames + ["walk.gif"])
print "deleting temp. files"
for fname in fnames:
    os.remove(fname)