Step 1, trim all squares to 2.5", each block needs 13 coloured squares and 12 white. I have not chosen any colour layouts, just go with whatever looks nice to you. I do however suggest you remove all cats from the area or feed them first or prepare for sabotage.
Quilt will be our future picnic rug so I have added lots of cute prints to the selection, it's not an eye spy, more a modern character look. Can't wait till the blocks come back, I love the one I have made and have been admiring all the flickr ones too, great inspiration.