Graphics3D[{
SurfaceColor[RGBColor[0,.7,.8]],
Cuboid[{23,-17,37},{35,-5,49}],
SurfaceColor[RGBColor[0,.7,.8]],
Cuboid[{-35,5,-49},{-23,17,-37}],
SurfaceColor[RGBColor[0,.7,.8]],
Cuboid[{-17,23,-49},{-5,35,-37}],
SurfaceColor[RGBColor[0,.7,.8]],
Cuboid[{5,-35,37},{17,-23,49}],
},
  AmbientLight -> GrayLevel[0.7],
  PlotRange -> {{-49, 49}, {-49, 49}, {-49, 49}}
  ]
  