intersection{ //----------------------------------------------------------------
// linear prism in x-direction: from ... to ..., number of points (first = last)
prism { -1.00 ,1.00 , 4
        <-1.00, 0.00>, // first point
        < 1.00, 0.00>, 
        < 0.00, 1.50>,
        <-1.00, 0.00>  // last point = first point!!!
        rotate<-90,-90,0> //turns prism in x direction! Don't change this line!  
      } // end of prism --------------------------------------------------------

// linear prism in z-direction: from ,to ,number of points (first = last)
prism { -1.00 ,1.00 , 4
       <-1.00, 0.00>,  // first point
       < 1.00, 0.00>, 
       < 0.00, 1.50>, 
       <-1.00, 0.00>   // last point = first point!!!!
       rotate<-90,0,0> scale<1,1,-1> //turns prism in z direction!  
      } // end of prism --------------------------------------------------------

  texture { pigment{ color Scarlet} 
            finish { phong 0.2}
          } // end of texture

  scale <1.00, 1.00, 1.00>*1.05
  rotate<0,0,0> 
  translate<0.00, 0.00, 0.00> 
}// ------------------------------------------------------- end of intersection