Part 5
======

## Installation

```bash
elm-package install
```

(Answer `y` when prompted.)


## Building

```bash
elm-live Main.elm --open --output=elm.js
```

## References

* [**case-expressions**](http://elm-lang.org/docs/syntax#conditionals)
* [Union Types syntax reference](http://elm-lang.org/docs/syntax#union-types)