Matinee

Matinee is UE4s animation timeline. For this project I used it for basic movements such as a rotating sign.

To begin with, I added a Matinee Actor by clicking Matinee on the top toolbar and pressing 'Add Matinee'.

This opens up the timeline...

In this window, I'm able to create a certain group that controls what object I animate and what type of animation it does when keyframed. In this case it was an Empty Group with a Movement Track attached. This allows me to select the object and keyframe its rotations.

Here is the group with keyframes added for the sign. As the animation plays it smoothly changes between 90 degree rotations until ending at 360, resetting to 0 and repeating. This creates a constantly rotating sign for as long as the game is being played.

I did the same for the day/night cycle however instead of a Empty Group it was using a lighting group.