I just got back my Hilbert Curve space-filling fabric from spoonflower, a site that'll print any image onto a variety of fabrics.
Space-filling fabric is suitable for tiling any plain spots on your walls, or for topological application. For storage, fold into a moebius strip and store in a Klein Bottle.
(The “Hilbert Curve” is a recursive space-filling function. If we color the corners of each square instead instead of drawing lines between them, we get the pattern you see below.)
Source code and images available at http://lunkwill.org/src/hilbert/.