The Step Pattern is as follows:
So, in the key of A minor (note, as in C major, there are no sharps or flats), we get:
On the guitar, we could play it on the G string (3rd string) like this:
Since it is not entirely functional to play a scale on a single string, we can find the notes of this scale across all strings, as outlined below.
This pattern can be used when the root note of the natural minor scale falls anywhere on the 5th string.
This pattern can be used when the root note of the natural minor scale falls anywhere on the 6th string.