#include "colors.inc"
#include "textures.inc"

camera {
  location <2, 2, -1>
  look_at <0, 0, 0>
}    


box {                 
   <-1,-1,0>,<1,1,1.3>
   hollow
   pigment {rgbt <0,0,0,1>}
   interior {
      media {
         intervals 1         
         samples 1,1          
         emission <1,1,0>
      }
   }
}