Most Major Scales have a basic set up. For example, lets start with the G major 
scale:

G|—————————————————————|
D|———————————2—4—5—————|
A|—————2—3—5———————————|
E|—3—5—————————————————|
   2 4 1 2 4 1 3 4

Now, as shown above, finger per fret on scales is basically a must if you want 
speed. The correct formation of scales, with finger per fret, is:

Index finger= 1
Middle finger= 2
Ring Finger= 3
Pinky= 4

2, 4, 
1, 2, 4,
1, 3, 4

Every change of lines indicates a higher string. For example, if you wanted 
to play a D major scale coming off of the E string, you would play:

|—————————————————|
|———————————4—6—7—|
|—————4—5—7———————|
|—5—7—————————————|
  2 4 1 2 4 1 3 4

Any questions feel free to message me. Thanks