Where can I get this texture?

Question

Design

(only without a background to make your own color)

Answer 1

make such a pattern with a 1-pixel pencil, add it as your custom one and use shift + F5 to fill in the desired area with it. (in your case, you will need to draw a strip in the other direction).
well, if you need the lines to be denser, then make a document 5x5 or 3x3 pixels.