Abstract; An Application of Statistical Mechanics to Dark Energy A reexamination of a past application of order-disorder theory to a new two dimensional application produces a toy model of “dark energy.” This model of the universe contains negative pressure. The model depicts sparse basic geometric figures having vertices covered with celestial objects. Most of the basic figures are empty or considered as vacuum covered. There are interactions between the occupied adjacent vertices of the basic figures. The basic figures change from a point to a bond to a triangle and, as larger basic figures are considered, the results become more accurate as the mathematics become more difficult. There is no need in this application to resort to phenomena as negative mass or anti matter, etc. in order to explain dark energy as has been done in some other publications. However, new publications that refer to entangled growth and coevolution of correlated multiplex networks seem appropriate.