Marzan’s new project, UrbanTiles, is a matrix of linking tiles that attach to a building like Venetian blinds. On one side are photovoltaic cells that capture energy as the sun beats down in the day; on the other are OLED (organic light emitting diodes) panels which use that stored solar energy to light interior rooms, act as large TV screens, or even flip outward to create dazzling, skyscraper-high light displays on the outside walls of the building.