The easiest way to make a pattern. sa it is so easy there will be no pictures included.
Created by: Aapje

1. Open up photoshop and make a new 3 x 3 transparent file.

2. Zoom in to 1600%

3. Take the Pencil and put a black dot in the middle of the square

4. Now go to ' Edit -> Define Pattern '

5. Give the pattern a name and you are done. You can now close that layer without saving it.