For example: in scale degree numbers for 3rds 1 3 2 4 3 5 4 6 5 7 6 8 ect.. now these arenn't fret numbers but the 1 is the root 2 is the second note in the scale 3rd is well you should get it.
Ex.2 A major
E----------------------------------------------------4---5--4--7
B-------------------------------------------5---7-5---7---------
G------------------------------4---6-4-7-6---7------------------
D-----------------4---6-4-7-6---7-------------------------------
A----4---5-4-7-5---7--------------------------------------------
E--5---7---------------------------------------------------------

repeat the process in intervals of 4ths (1 scale degree larger than a 3rd) and so on