Instructions:
1.Open Photoshop CS5.1
2.Click File; New
3.Make the width and height 3x3 pixels, transparent
4.Zoom In until the box is big enough for you to work on
5.On the left side, you will see a brush tool, click and hold it until you see a pencil tool;click it
6.Choose the color you want the lines to be.
7.With the tool, click the 3 pixels going in a diagonal direction
8.On the top, click edit; define pattern, name it whatever you want
9.Close the box, make a new project what ever size you want, but make sure it has a solid color.
10.right click the box you made, double click blending options; choose your pattern and WHALAA!!!

Yes i know this tutorial has already been made, but i tried to put it into my own words and give it a little twist. What do you think?