Could you tell me how you got all your squares to block together so nicely? Was is careful measuring or was it just a few sized blocks that you knew would fit later?
There are 3 different sizes of block - a 3 x 3, a 6 x 6 and a 12 x 12 - and I drew out a design before I started...
You could probably wing it and just randomly throw blocks together as you go, but I find it a lot easier to work to a plan.
I also gave myself an extra large seam allowance on the strips I knew were going to be around the outside edges to I'd have some room to make adjustments if I'd messed up anywhere along the way.
Honestly, I think with it being so...uh...'visually agressive'
if your seams are a bit off, no-one is likely to notice.
If you do end up making yourself one, I'd love to see the pics. Let me know how you get on.