Six words and a line break, and the poem still manages to build a small, strange scene. The first three lines are just a stack of nouns: ceiling, fan, spider. Read quickly, they sound like a list of things in a room. Then "spinning" arrives, and the word does double duty. A ceiling fan spins, and a spider spins a web. "All night" suggests that neither stops.
The speaker never says how they feel, but the poem hints at someone lying awake. Only a person who can't sleep would notice the fan's turning and the spider's work through the dark hours. The mood is quiet, a little eerie, and oddly patient. There's something hypnotic in the repeated motion, and something unsettling too: a spider that might be building a web right beside the blades. The short, narrow lines slow the reading down, so it feels like watching, waiting, and not sleeping.