Learn how to easily create mini-squared pattern.
Create new file with size 160x120 pixels. Fill it with solid color (say, blue).
Apply <b>noise</b> filter (Filter menu - Noise - Add Noise). Try different amuont values to choose what you like most.
Now we need to resize our image (Image menu - Image size). First, change pixels to percent in width dropdown. You will notice Width value is now 100 (per cent). Change it to 1000 (we
Cool! Now we already have a nice pattern built from mini squares (each is 10x10 pixels). But we can do more.
We will need a 1-pixel gap between the squares. To do so, we will need another image to help us. Create new image, 10x10 pixels, transparent background.