COVE MOLDING: The cove molding around the ceiling makes this room seem larger. It gives it a feel of separation form the walls to the ceiling. Cove molding is different from other walls because most walls don't have a separation form wall to ceiling.
party , event function or shop display lighting The blog doesn't have these as a DIY, but sure looks like they could be replicated with metal ring or hula hoop painted black. Use zip ties to attach mini lights and hang them up. Shop mini lights online at