Hi everybody.

I'm new around here, this is my first post.

A long time ago I came up with this little sketch of a tune and I've had pretty hard times to understand its harmony.

Its main structure is made of a simple progression of Gsus4 - Fsus2

I start the guitar solo with a pretty weird progression: Db, Bb, C
Then I go back to the main progression.

The solo on the main progression is basically played in G minor, but I take some notes from the major scale as well.

I'd like to ask for a little help and collaboration understanding the harmony of this (specially the Db, Bb, C part) as well as some ideas for further development of the tune.

This is for pure fun and obviously I would give credits for those who eventually helped me with this.