new to While statements

[krismesenbrink at gmail.com]

import random



def room ():

    hp = 10
    while hp != 0:

        random_Number = random.randint(1, 2)

        #asking if you want to roll/play
        des = input("Would you like to roll the die?")

        if des == ("y"):
            print ("Rolling the die...")
            print ("You rolled a...")
            print (random_Number)

            #a "monster" appers if you roll a 1""
            if random_Number == 1:
                monster_hp = 10
                print ("Oh no a Monsster!")
                print ("would you like to attack?")
                answer = input("y or n?")
                if answer == "y":
                    #if you choose to battle this is what happens
                    while monster_hp >=0:
                        print ("you attack")
                        damage_done = random.randint(0,5)
                        print ("You do ",damage_done,"damage")
                        monster_hp = monster_hp - damage_done
                        print ("the monster takes a hit, it has ", monster_hp,
                        "left")


                elif answer == ("n"):
                    print ("you run away")

                else:
                    print ("You and the monster just stare at one another")
            else:
                print ("You find nothing")
        # if you decisde to not play it will kill you
        elif des == ("no"):
            hp = 0
            print ("Maybe next time!")
        else:
            print ("please enter yes or no")

room()


this is the code i'm making. as the subject says im new to while statements. i am having problems with the monster battle part, it takes health away from the "monster" but as soon as it gets to 0 or less i'd like the code to start from the top and ask you to roll the die again. any help on this would be greatly appreciative