Vomit, bleed.

In order to minimize repetition of the method call to `colorize` with certain parameters, I figured it would be best to simplify it a bit. I didn't know quite how to name the methods, so... this is what happened. :smile: Feel free to suggest different names, but I think centralizing the method calls here is important.

- `vomit` = `colorize(str, :green)`
- `bleed` = `colorize(str, :red)`