mortal kombat console game python2

Question

I just try to make a fighting game that work on console.It's almost finished but I have 2 problem.

1. The game should finish when a user's hp decrease to 1.It doesn't finishing when hp is 0.It gives one more chance to other user.

2. Other one is,after that the game finish,I wanna ask to user "wanna play again?"and if the user says "yes" the game must start before than coin toss.

How can I solve these problems quickly and where is my fault?

import random
import time


while True:    
    first_heros_name = raw_input("----- First Hero ----- \n Please type your hero's name: ")
    if len(first_heros_name) > 1:
        print ("First hero's name is", first_heros_name.capitalize())
        break
    else:
        print "Length of hero's name must be longer than 1 character."

while True:    
    second_heros_name = raw_input("----- Second Hero ----- \n Please type your hero's name: ")
    if len(second_heros_name) <= 1:
        print "Length of hero's name must be longer than 1 character."        
    elif second_heros_name == first_heros_name:
        print first_heros_name, "is taken, please choose another name!"

    else:
        print("Second hero's name is"), second_heros_name.capitalize()
        break

players_list = [first_heros_name, second_heros_name]
coin_toss = random.choice(players_list)
players_list.remove(coin_toss)
print "Coin toss result: %s starts first!" %coin_toss #Coin toss result
print "The game begins in 5 seconds!" #countdown
##time.sleep(1)
##print "---4---"
##time.sleep(1)
##print "---3---"
##time.sleep(1)
##print "---2---"
##time.sleep(1)
##print "---1---"
##time.sleep(1)



def attack1(current_hp):
    hp2=current_hp
    chance_of_damaging=random.randint(0,100)
    print "--------------- %s Attacks !! ---------------"%coin_toss
    while True:
        attack_magnitute=input("Choose your attack magnitude between 1 and 50: ")

        if attack_magnitute > 50:
            print "The attack magnitude must be between 1 and 50."

        elif attack_magnitute < 1:
            print "The attack magnitude must be between 1 and 50."
        else:
            break


    while True:
        if chance_of_damaging > attack_magnitute:
            print coin_toss, " hits %s damage!!"%attack_magnitute
            hp2=hp2-attack_magnitute
            return hp2
        else:
            print "Ooopsy! %s missed the attack!"%coin_toss
            return hp2

def attack2(current_hp):
    hp1=current_hp
    chance_of_damaging=random.randint(0,100)
    print "--------------- %s Attacks !! ---------------"%players_list
    while True:
        attack_magnitute=input("Choose your attack magnitude between 1 and 50: ")

        if attack_magnitute > 50:
            print "The attack magnitude must be between 1 and 50."

        elif attack_magnitute < 1:
            print "The attack magnitude must be between 1 and 50."
        else:
            break


    while True:
        if chance_of_damaging > attack_magnitute:
            print players_list, " hits %s damage!!"%attack_magnitute
            hp1=hp1-attack_magnitute
            return hp1
        else:
            print "Ooopsy! %s missed the attack!"%players_list
            return hp1

def main():
    hp1, hp2 = (100,100)
    while hp2<=1:
        print players_list, " win"
        break

    while hp1 > 1 and hp2 > 1:
            hp1 = attack1(hp1)
            print coin_toss,"                                                                 ", players_list

            print "HP [%s]:"%hp2, hp2/2 * "|" ,"        ", "HP [%s]:"%hp1, hp1/2 * "|" 
            hp2 = attack2(hp2)
            print coin_toss,"                                                                 ", players_list

            print "HP [%s]:"%hp2, hp2/2 * "|" ,"        ", "HP [%s]:"%hp1, hp1/2 * "|"

    while hp1<=1:
        print coin_toss, " win"
        break





main()