G Lydian scale on the guitar fretboard

The G Lydian scale is made of G (the root), A (major second), B (major third), C# (augmented fourth), D (perfect fifth), E (major sixth) and F# (major 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 Lydian mode is the fourth mode of the major scale, a major scale with a raised fourth. The raised fourth sits a tritone from the root, and the scale shares its notes with a major scale a fifth above. It is the brightest of the seven modes.