This is a clean guitar lick I came up with after messing around with some open string chord voicings from an old guitar lesson. I haven't analyzed the voicings but I hear it as some variation on the root note of the chord. I would consider this as an Amaj9/C#7 sus2/B7 sus2 progression but there are different ways to look at the notes that make up the voicings. I just liked the progression at the end of the day so I didn't worry too much about the music theory underlying the chord progression.
