Wiggly Letters (8pts)

**What feature should we add**
In the show the letters above their heads can be seen to wiggly a little. 

**How should it be implemented**
The letters can move up and down slightly and slowly for random intervals.

**Additional context**
You might want to check out [lerp](https://docs.unity3d.com/ScriptReference/Vector3.Lerp.html) for this.
