How do I make a simple Quest system?

Part 21: Alright now, repeat steps 16 - 20 replacing the trigger box with the second trigger box (the one over the box the player will need to touch) and make sure when you create the widget you use the third object widget.

          It should look something like this.

Part 22: Time to check some stuff out. First here we are in the game. It seems that our Event Begin Play setup seems to be working…

Part 23: And after 5 seconds it seems to go away. Not bad, now lets see if the triggers work.

Part 24: Alright, so when the player enters the trigger the text appears…it works, but I feel like something seems off here. I’ll just store that instinct in the back of my mind while we continue.

Part 25: When the player exits the trigger the text disappears.

Part 26: And it would seem…

Part 27: … the box objective works (when the player touches the box they get our congratulatory message as a reward)…and the text disappears after they leave the trigger box

Part 28: But wait…didn’t I just complete that object?! I can’t do it again! Oh the horror! The children! The-

          Ahem.  Sorry, lost myself there.  Well it seems we have a problem, the trigger near the doorway is still displaying text even after completing the objective...