I realise how much of an idiot I looked now. I now know what scales are and what they are used for. I have committed some to memory but I was wondering something....

(I'll just use the simplest Am pentatonic for this)

5-----8
5-----8
5--7---
5--7---
5--7---
5-----8

Now, I can play it going from e to E. How about I just play two strings using all the notes in the scale. Like I only play strings e & g. Or do you have to play all notes in the scale to make it a proper scale. Dumb question but its been bothering me. And is could this be an example of alternate picking in a scale……

Playing a high e, then g, then going to b, then d?????