I did this a few years back on a short day. Thought I’d offer up three more bite-size spooky haiku.

1.
Warm days to cold nights.
Shadows lengthen, darkness grows.
The veil grows thinner.

2.
Creaks in empty house,
Footsteps loud without real feet—
Someone’s there; none alive.

3.
Doors close, faucets run,
Knocks on walls, crash in the night—
Mischievous haunt.