// Persistence Of Vision raytracer version 3.0
// A group of colored spheres
// sample file by T.Higo  05.1998

#version 3.0
global_settings { assumed_gamma 2.2 }

#include "colors.inc"

camera {
   location <-20,10,-30>
   angle 10
   look_at <0, 2, 0>
}

light_source {<-50, 100, -50> color White}

#declare Cy=0 #while (Cy < 4)
  #declare Cz=0 #while (Cz < 4)
    #declare Cx=0 #while (Cx < 4)
      sphere { < 0,0,0> 0.3
      no_shadow
      pigment { color rgb < 1-Cx/3, Cy/3, 1-Cz/3>}
      translate < Cx, Cy, Cz >
      }
    #declare Cx=Cx+1 #end
  #declare Cz=Cz+1 #end
#declare Cy=Cy+1 #end

background { color White }