Adding a open door to my KeyPad

Hey All

Hope you can help me out, i made a keypad, where you had to put in a code and then i shows right or wrong. it works fine and all. BUt but but now i’m stuck the guy i follow in the tut dosent add the door or anything.

this is the tut i used so fare.

Now my question is, where would you put in the door in all of this so it only can be open when you put in the right code ???