F# Phrygian scale on the guitar fretboard
The F# Phrygian scale is made of F# (the root), G (minor second), A (minor third), B (perfect fourth), C# (perfect fifth), D (minor sixth) and E (minor seventh). The fretboard shows every one of them across the neck in standard tuning (E A D G B E), and plays them back so you can hear the scale.
The Phrygian mode is the third mode of the major scale, a minor scale with a lowered second. That lowered second sits a semitone above the root on the neck. It shares its notes with a major scale a major third below.