Blueprint

Just 4 screenshots from the Blueprint tutorial. It's based around interactivity, so pictures don't do it justice.

Here's the nodes and how they're connected.

Here's the scene that came from the project files. You can see the light, and the monitor to interact with.

When you get close enough, "Press F to Activate" shows up.

When you press F, the light turns green.

Blueprint is very useful, and I like using it. It's simple, and adds a lot to whatever you are working on.