Sounds like a puzzle written in light. Picture a narrow alcove where a single sliver of daylight falls on a rough stone wall, casting a line that shifts every hour. The shadow starts as a straight edge, then—when the sun moves—morphs into a figure that could be a person or a creature. The trick is to arrange the geometry so that the story unfolds automatically, like a secret theater that only opens when the light changes. A bit of trickery, a lot of patience, and you’ve got yourself a living tableau.