This action will make patterns from any square"Hold shift and drag"

I've seen some other similar actions around but most I've seen are preset for certain dimensions.

This set will work for any size you decide to use.

This will crop the image to the selected area.
Cut the image.
Create a new document.
Past the image 4x
Rotate the images.
Align them to the four corners.
Merge the layers.
And finally Save the pattern.