Graphics3D Exercises

TK[k_]:={{k,-k,k},{0,0,0},{k,k,k},
{-k,k,k},{-k,-k,k},{k,-k,k},
{k,k,k},{k,k,-k},{-k,k,-k},
{-k,-k,-k},{k,-k,-k},{k,k,-k},
{0,0,0},{k,-k,-k},{k,-k,k}};
Graphics3D[Table[{FaceForm[{ColorData["BrightBands"][.07i],
Opacity[.6]}],Tube[TK[1][[i;;i+1]],.1],
Opacity[1],Sphere[TK[1][[i]],.15]},{i,14}],
Boxed->False,Background->Black,
ViewPoint->{3,-1,0},ImageSize->500]