An old empty asylum centre. Stripped of all floors and electricity. Holes in the floor through which you can see the rooms beneath you.
A thin black cotton ribbon runs trough a sewing machine. The ribbon goes up trough the hole in the ceiling trough the second floor all the way to the top floor. There it runs over wheels back to the first floor back to the sewing machine.
The machine is stitching en pulling running the black ribbon al the way round the building. The stitches are white. Stitch for stitch, little bright steps running trough the building.