I didn't plan it at all. I didn't even know the width of the border design or the length of the pattern repeat (I still don't since I didn't measure that). It could have ended up just about anywhere and there might have been an oval like this in the corners. I would have been OK with that too.
Or I could have adjusted what the center point was and ended at something I was pleased with. That's why I sewed two sides on next to each other instead of doing opposite ends first as I normally would. So that I could see what the corner would look like before doing the others.