// SPOTLIGHT /  Light Rings '05.01
// by Tsutomu HIGO  URL: http://www.asahi-net.or.jp/~nj2t-hg/

#version 3.6;
global_settings {
  max_trace_level 6
  assumed_gamma 2.2
  }

camera {
  location <0, 50, -50>
  look_at <25, 35, 0>
  angle 80
  }

media {
  scattering { 2, rgb 0.03 }
  intervals 1
  samples 30
  method 3
  }

#declare Intensity = 20;
union {
  light_source {
  <0, 4, 0>
  color rgb<.5, .3, 1> * Intensity
  spotlight
  point_at <0, 10, 0>
  radius 60
  falloff 50
  tightness 2
  media_attenuation on
  }
  #declare I = 0; #declare Imax = 30; #while(I<Imax)
    torus {12, 1  translate y*6*I}
  #declare I = I+1; #end
  pigment { rgbt <1, 0, 0, 0> }
  finish { ambient 0.2 diffuse 1 phong 1 }
  rotate z*-30
  }