Tesseract
There are many types of space - such as flat "Euclidian Space" and curved "Einsteinian Space" -
I postulated a new type of space: "Z-Space" - comprised of sets of "zones". The familiar figure, the tesseract (or shadow of a 4-dimensional cube) exists in Z- Space. It is comprised of four zones (or sets of parallel lines): the vertical lines, the horizontal lines and two sets of diagonal lines.