Creating our base

1. Open a new document. I'll be using 900px x 927px, and 72 as pixel/inch.
Fill the background layer using the paintbucket tool ( or G).


2. Create a new layer (Layer >> New >> Layer or press Shift + Ctrl + N).
There is where we're going to apply our scanlines.

3. Now, to make the scanlines, open a new 9px x 9px document.
Zoom it as much as you can.



Pick the Pencil tool by clicking on the Brush Tool and holding a few seconds.
A drop-down menu will appear then, so pick the pencil tool.


4. We need to use some square brushes. Photoshop includes a set of square brushes by default, so we're going to use that one.


Select the "1px square brush" and using #231e1d as foreground color, draw a diagonal line.