Watch the Major Scale 5 Shapes Play-Along online guitar lesson by Rob Garland from Melodic Soloing: Major Scale
Use the fingering that I used in the demonstration, one finger per fret to play all 5 shapes. Play the scale using alternate pick strokes. Look at where the first octave begins and ends, and also where the second octave runs from. Play along with me at 72 BPM and 92 BPM.