A C D E G (1 ♭3 4 5 ♭7)
The rock and blues lead workhorse. Box 1 has the root under your first finger on the 6th string; the five boxes link end to end up the neck.
Boxes: the standard five shapes, two notes per string, one finger per fret. Learn one, then the next one up: they share an edge. Dots show scale degrees: 1 is the root.