I make one pattern and I edit the borders in. I make sure some of the bricks/tiles are half on one side and continue on the other so they tessellate nicely. Here’s a crude drawing to help me explain cuz im terrishit at explaining things.
So you might have a few bricks that are a couple blocks smaller and you might half to half some because I’ve yet to find the perfect combinations of blocks to be able to do that! Most people don’t even notice so do what you can friend!