Create a new canvas with the size of 1 x 1 in. using your ruler pull a vertical guide to 0.50in. then pull 3 horizontal guides 0.25 in. space between each.
Using the the HEX colors below create rectangles 0.25in H x 0.5in. W and position them within the guides
Define As Pattern
Click Edit -> Define Pattern and give it a pattern name. (Carbon Fibre for instance). Click OKto save it as a pattern.
Using Carbon Fibre Pattern
To test the carbon fibre pattern, create a new canvas with bigger size, 500x400px would be good. Click on Edit -> Fill (or Shift + F5), choose the carbon fibre pattern created just now, click OK and fill the section up. Here’s how your carbon fibre background should looks like