The invention is a building panel and clip system, in which the building panel members are quickly and reversibly attached to other similar building panel members with clip members to form a temporary structure that provides shelter from the elements. Alternatively, the building panel members are erected interior an existing structure to provide partitioning of the space therein. The building panel members are used to form both vertical walls and the roof for such an exterior structure. The building panel members may incorporate a door or a window for added versatility.