#include "colors.inc"
  camera {
    location <5, 25, 25>	
    look_at 0
  }
  background { color Black }
  light_source { <300, 300, 700> White }
  plane { y, -12
    texture {
      pigment {
        checker
        color Black
        color Silver
      }
    }
  }

  #declare A1 = <10,0,0>;
  #declare A2 = <7,5,0>;
  #declare A3 = <3,6,0>;
  #declare A4 = <0,10,0>;
  #declare A5 = <10,0,0>;
  #declare A6 = <7,1,5>;
  #declare A7 = <3,1,5>;
  #declare A8 = <0,1,5>;
  #declare A9 = <10,0,0>;
  #declare A10 = <7,-1,5>;
  #declare A11 = <3,-1,5>;
  #declare A12 = <0,-1,5>;
  #declare A13 = <10,0,0>;
  #declare A14 = <7,-5,0>;
  #declare A15 = <3,-6,0>;
  #declare A16 = <0,-10,0>;

  #declare B1 = <0,10,0>;
  #declare B2 = <-9,3,0>;
  #declare B3 = <-14,2,0>;
  #declare B4 = <-25,0,0>;
  #declare B5 = <0,1,5>;
  #declare B6 = <-9,0.5,5>;
  #declare B7 = <-14,0.2,5>;
  #declare B8 = <-25,0,0>;
  #declare B9 = <0,-1,5>;
  #declare B10 = <-9,-0.5,5>;
  #declare B11 = <-14,-0.2,5>;
  #declare B12 = <-25,0,0>;
  #declare B13 = <0,-10,0>;
  #declare B14 = <-9,-3,0>;
  #declare B15 = <-14,-2,0>;
  #declare B16 = <-25,0,0>;

  #declare patchA =
	bicubic_patch {
		type 1	
		flatness 0.01 u_steps 4 v_steps 4,
		A1,A2,A3,A4,
		A5,A6,A7,A8,
		A9,A10,A11,A12,
		A13,A14,A15,A16
		texture {
			pigment { Blue }
			finish {
                                ambient .1
      				diffuse .4
      				specular 1
      				roughness 0.001
      				reflection .5
				metallic
				}
			}
		rotate x*90
	}


  #declare patchB =
	bicubic_patch {
		type 1
		flatness 0.01 u_steps 4 v_steps 4,
		B1,B2,B3,B4,
		B5,B6,B7,B8,
		B9,B10,B11,B12,
		B13,B14,B15,B16
		texture {
			pigment { Blue }
			finish {
                                ambient .1
      				diffuse .4
      				specular 1
      				roughness 0.001
      				reflection .5
				metallic
				}
			}
		rotate x*90
	}

  object { patchA }
  object { patchB }