Adding interactive elements using Triggers and Blueprints

Right now, our game level is looking pretty good. We have given it some props that make the player feel they are wandering around the insides of a small cargo ship. Using lights, we have communicated to the player a sense of danger and mystery. The final step in finishing this level will be to add some basic interactive elements. For that we are going to need a Blueprint.

A Blueprint is a visual scripting engine built into the Unreal game engine that allows artists and other non-programmers to program game mechanics and level events without ever looking at a line of code. I have also found during my years of teaching that it is a great way to introduce yourself to programming techniques, as a Blueprint uses many of the same terms. For our purposes, we will use Blueprints to animate our two doors and our elevator so that our player has some interactive elements to play with:

All Blueprints have an Event to kick them off, followed by...