Another small demo inspired by an article of journal 'Spektrum der Wissenschaft'. Its a simulation of a so called dancing octahedron (or Buckminster Fullers jitterbug), where trianglepoints are connected pairwise. In the simulation having only the triangles would make the object fold together. Thus auxilliary structure (gray lines) is needed to shape its form and behavior. In the demo the object can be dragged around (mouse/touch).