This is a "tile" An image is a tile if you can put it side by side "tiling" it such that no seams show. Of course the pattern of the tile repeats, that's the whole concept of tiling a space with a tile!

This was real tricky to make... The part of the insulator that hands off the left side of the image has to wrap around and have the reminder of it on the right hand side.

See the [id=280256721; next picture] for the single tile that when you fill an area with it, you get this picture.