Animations with Python and terminal output

animations.py

# More info about ANSI escape sequences
# http://ascii-table.com/ansi-escape-sequences.php

import sys
import random
from time import sleep

ROWS = 10

while True:
    for i in range(0, ROWS):
       sys.stdout.write("*"*random.randint(1, 10) + "\n")

    sys.stdout.flush()

    sleep(1)

    for i in range(0, ROWS):
       sys.stdout.write("\033[K")  # remove line
       sys.stdout.write("\033[1A") # up the cursor