Luna is an interior door with an adjustable grid of holes that can be opened and closed to control the flow of light and air between two rooms. The door is constructed of a hollow core with an interior panel that slides from left to right. The exterior surface can be skinned in a variety of wood, metal, plastic and fabric materials. The holes are placed in a grid in a neutral pattern that creates an innate beauty in the changing rhythm of the holes as they shift between full circles, crescent moons and completely closed holes.