They come attached to mesh backing, all tiles on a mesh the same colour, of course. So in order to have checkerboard and stripes, we either have to remove them all and place them one by one (bit of a pain in the ass since they're 5x5 cm) or rearrange the tiles on the mesh.
I've begun working on rearranging them. The white tile sheets are separated from each other by a waxed paper, which comes in handy, but the black ones do not have it.
First I remove alternating tiles from the mesh, they come off easily, while trying to not distort the mesh. I then I lay the sheet over the waxed paper, apply a little PVA glue (white wood glue) to the back of the tile (of the opposite colour), and lay it carefully. I guide myself by eye and also some 3mm (the given grout line in the mesh) layout crosses. The tiles are not perfect and even, so some eyeballing is always necessary. I lay a sheet on top of another so that the weight will help them set and not shift.
I think it took me about two hours to do one square metre. I have the impression the stripes are gonna be more time consuming ;) it is also a lot more surface.
