For things that don’t fall under the purview of automatic formatting
(indentation, tabs vs. spaces, double vs. single quotes, etc.) look here
for some guidance.

Bad:

Function callers and callees should be close

If a function calls another, keep those functions vertically close in the source
file. Ideally, keep the caller right above the callee. We tend to read code from
top-to-bottom, like a newspaper. Because of this, make your code read that way.

Good: