We'll use simple text, some compositing nodes and a couple of tricks for a blender scene that will bring your text and messages to the third dimention. Simple stuff again. Enjoy!
You can check the result on the video below. As always feel free to experiment and try using your own ideas and settings for the scene. As you can see it's pretty easy to build, so feel free to add bigger messages and even create some shapes or simple structures with your text.
Feel free to download the final .blendfile from here.