Simple hex to binary practice script

import time

default_timer = 2 #Change default time added for each hex value you want to convert

print "Each hex character will add {} seconds on the timer...".format(default_timer)
inputHex = raw_input('Input Hex Value: ')

calc_time = default_timer * len(inputHex) #Calculate how much time for user to calculate binary

bConvert = bin(int(inputHex, 16)) #Convert to hex
bits = len(bConvert[2:]) #Get length to pad zeros if needed..
bConvertNew = bConvert[2:].zfill(bits) #New variable because converting hex will also add 0b at the

#Space out the binary every 4 bits (so we can see each hex in binary)
spacedConvert = [bConvertNew[i:i+4] for i in range(0, len(bConvertNew), 4)] #Will convert to list
spacedConvert = ' '.join([bConvertNew[i:i+4] for i in range(0, len(bConvertNew), 4)]) #Rejoin list with space in between the binary values...

print "Start...You have {} seconds to convert\n\n".format(calc_time)
time.sleep(calc_time)

print spacedConvert