Game of nim

import random

rocks = random.randint(15,30)

def nim(stones):
    while stones > 0:


        player = int(input("How much would you like to bet?"))
        stones = stones-player
        print(str(stones) + " Remain")
        if stones == 0:
            print("You loses")
            break

        if stones >= 3:
            computer = random.randint(1,3)
            stones = stones-computer
            print("Ai picked " + str(computer))
            print(str(stones) + " Remain")
            if stones == 0:
                print("AI loses")
                break
            else:
                continue
        elif stones == 2:
            computer = random.randint(1,2)
            stones = stones-computer
            print("Ai picked " + str(computer))
            print(str(stones) + " Remain")
            if stones == 0:
                print("AI loses")
                break
            else:
                continue
        elif stones == 1:
            computer = random.randint(1,1)
            stones = stones-computer
            print("Ai picked " + str(computer))
            print(str(stones) + " Remain")
            if stones == 0:
                 print("AI loses")
                 break
            else:
                continue

nim(rocks)