Text entry

Hello,

I have an interaction where the user types in their own answer. I have all the variable set up so once they submit they can see their answer compared to the correct answer. 

But where it gets tricky for me is hiding the data entry box once it's submitted.

I know this isn't explained very well, so I attached what I'm working on. (When the slide first starts, the red rectangle isn't there, just when the answer is submitted, I just don't have time to do it)

Thanks (: