Olà in Python / ASCII art

ola.py

#!/usr/bin/env python
#-*- coding: utf-8 -*-
import os
import time


def cls():
    os.system(['clear', 'cls'][os.name == 'nt'])

figure_repos = '.o.'
figure_mid = '-o-'
figure_up = '\o/'
nb = 20

for i in xrange(nb):
    cls()
    figures = []
    for j in xrange(nb):
        if i == j:
            figures.append(figure_up)
        elif i == j-1 or i == j+1:
            figures.append(figure_mid)
        else:
            figures.append(figure_repos)
    print "".join(figures)
    time.sleep(0.3)