The number 7 has no significance to me. But when I saw that the last date to fill was 7/7, I got the idea of the Bicentennial-looking 7 that you see above. (Which, the more I think about it, the more I fear I actually pictures from a slot machine). I wanted to do something with multiple 7s getting smaller and smaller. But then I started adding textures, and it seemed a shame to bury them.
So, why not shrink and rotate. Clockwise starting from the top left: (in the Texture menu) Stained Glass, Patchwork, Mosaic and Tiles (in the Stylize Menu). (drawn 7/14).