In the world of design, you typically start very small with basic shapes and build from there. This is especially true when it comes to logos which are meant to be simple, easily recognizable, and quick to print. It has to be easy to identify in colour and in black and white.
Take a look at the Twitter logo.
You may not realize it, but there are actually nothing more than circles creating that design, thirteen of them to be exact. Don’t believe me?