There are many images on Google. I did mine so that 2 of the small squares meet diagonally in the center and the other two are in the "far" corners. If you number the 1/4 blocks from top left to bottom right, 1,2,3,4 then #1 has the small square at its top left. #2 has its small square at its bottom left. #3 the small corner is on its top right and #4 its on its bottom right. But that's just me. so many other layouts!
Oh good! While I was typing this lengthy description, "ekuw" posted a picture of what I meant!