I did that also to one of my first quilts with small blocks. It was for my grandson and was made of Puppy's, paws prints hydrants etc. I tried a fancy stitch and didn't like it so I was ripping stitches on the bak and sliced a 1/2 hole. The backing was a cute blue with tiny black paw prints. So what I did was make different sizes if blocks and blanket stitched by hand and made it like it was patch work all over. He just loved it. It is always on his bed. [he is 12 now] 4 yrs later]Pic in my avatar.I even made curtains and pillows to match. Good luck with your hole!!