Sunbeam Poem Projector by Jiyeon Song.
The type is formed ( as you can see ) through a complex array of perforations aligned with the passing of the sun. The poem takes about 8hrs to sweep through the full text. Based around the solar calendar, winter and summer display different poems. Extremely clever. Read the detailed description, see development sketches and don’t miss the ingenious video of initial experiments creating type from light and pin holes.