Wanna bet you can make a cool song based on just one bass “phrase”? :) Well, you can. Sometimes no one gives a flying bird about complexity because the feeling is way more important. Also, I'm feeling like playing something like this right now, so I hope you'll enjoy some classic Pixies today.
There's a special kind of bands you shouldn't like but still do :) Pixies is exactly that band for me. I've discovered them accidentally just a couple of years ago but just can't stop listening to their albums. Maybe it's a virus, I dunno. “Where Is My Mind?” is one of Pixies' best known songs ever and I've decided to start with it. Also, it's a great example of an awesome song based on 4 notes, so it's fun to play too :)