New to UE need a little help with Triggers/Collision

As the title says, I’m new to UE. I have used other game creation software in the past, but nothing like this. Now. I have a question about triggers or collision. I’m trying to remake an old puzzle game I started YEARS ago in an old program called Dark Basic.

In the attached Image is a rough layout of what I’m doing. What I need to happen is if one of the smaller blocks is touched, it needs to start a short timer ~5 seconds-ish and then the block to disappear. How might one go about this? I’ve looked at a few tutorials on trigger boxes and I don’t fully understand it, or how it might connect to the actual box itself.

If anyone can maybe guide me as to how I might accomplish this, it would be greatly appreciated.

I hope what I have said makes sense.

Never mind, I figured it out eventually through several days of trial and error.