Note that tesseract is 12 feet square with various wind devices on top, and completely enclosed. Occupants will be bathed in various lighting affects. The Tesseract itself is 12 feet square and 8 feet tall of occupiable space. It is completely enclosed with cloth. The top has various wind powered devices which spin horizontal disks to bathe occupants in various light patterns.
Occupants can manipulate lighting affects at night from a control box inside the tesseract.