This is a cool lick using Major 6ths, it's a great lick for building tension in your guitar solos. A major 6th is the distance from the root note of a major scale to the major 6th interval.
In the key of A the major 6th interval would be A to E or the key of C the major 6th interval would be C to A and so on. In this example we are using the A Major Scale starting on the 6th string and working our way up. The song "Brown Eye Girl" by Van Morrison uses major 6ths as the main riff throughout the song.
View the included Guitar Tab and Midi File sample in the attachments below.