Multi-threading with a simple timer?

[David D]

This works, but does not do exactly what I want. What I want to happen is : when the user enters in a correct answer, the program and threading stops.  Any ideas on what I should change? 

import time 
from threading import Thread 

class Answer(Thread): 
    def run(self): 
        a=input("What is your answer:") 
        if a=="yes": 
            print("yes you got it") 
            finished() 
        else: 
            print("no") 

class myTimer(Thread): 
    def run(self): 
        print() 
        for x in range(5): 

            time.sleep(1) 

Answer().start() 
myTimer().start() 
print("you lost") 

def finished(): 
    print("done")