(* cube with thick colored edges *)
Graphics3D[{
  
      RGBColor[1., 0., 0],
      Polygon[{{1,1,1},{-1,1,1},{-1,-1,1},{1,-1,1},{1,1,1}}],
      RGBColor[0., 0., 1.],
      Thickness[0.02],
      Line[{{1,1,-1},{-1,1,-1},{-1,-1,-1},{1,-1,-1},{1,1,-1}}]
      RGBColor[0., 1., 0.],
      Line[{{1,1,1},{1,1,-1}}],
      Line[{{-1,1,1},{-1,1,-1}}],
      Line[{{1,-1,1},{1,-1,-1}}],
      Line[{{-1,-1,1},{-1,-1,-1}}],
      {PointSize[.03], RGBColor[.5,.5,0], Point[{0,0,0}]},
      {PointSize[.05], RGBColor[.5,.5,0], Point[{0,1,0}]}
      } ,
     {Lighting -> False, Boxed -> False}]