Frets Tool

A tool to help you visualize guitar fretboards. It would be more built out if it didn't already fit my needs.
This can be quite handy for writing or learning music with a little bit of interval theory knowledge.
I would really love to return to it if I ever became more life, less work balanced.

For now, here it is unpolished and without instruction.
My basic advice is to make sense of what you're playing in a key, observing interval relationships, and what options you have in the same key.