Try to replicate Metasploit Framework init bar

bar_msfconsole.py

#!/usr/bin/env python

import sys
import time
from itertools import cycle

MESSAGE = ' [*] Starting Metasploit Framework Console...'
CYCLES = ['-', '\\', '|', '/']

for index in cycle(range(len(MESSAGE))):
    for c in CYCLES:
        if not MESSAGE[index].isalpha():
            continue
        buff = list(MESSAGE)
        buff.append(c)
        buff[index] = buff[index].swapcase()
        sys.stdout.write(''.join(buff))
        time.sleep(0.1)
        sys.stdout.write('\r')
        sys.stdout.flush()