The plane can be tiled using equilateral triangles giving the triangular tiling. All use Reinhardt's tiles, usually with additional conditions necessary for the tiling. Most den floors are made out of wood, carpet, or floor tiling. The hip roof contains dormers and is covered with terracotta tiling. Some are commonly used as roof tiling and decorative zellige tilework. A particularly interesting type of monohedral tessellation is the spiral monohedral tiling. His memory flashes back to the cave home when the laborer was tiling the kitchen. The four panels are most obviously connected by the floor tiling and vanishing point. This is the basis for an infinite tiling of the hexagon with hexagons. Several types of window managers exist for X11, including tiling, dynamic, stacking and compositing. These polygons are often seen in tiling patterns. It can also act as a rudimentary tiling window manager. A periodic tiling has a repeating pattern. A regular pentagon cannot appear in any tiling of regular polygons. This pattern repeats within the regular triangular tiling.