// RINGS1 / lpring12 '06.09
// by Tsutomu HIGO  URL:http://www.asahi-net.or.jp/~nj2t-hg/

#version 3.6;
global_settings {
  max_trace_level 9
  assumed_gamma 2.2
  }

camera {
  location <60, -30, -25>
  look_at <50, -28, 0>
  angle 80
  }

light_source {<-1000, -600, -500> color rgb <0.8, 0.8, 1>}

union {
  #declare Imax=500;
  #declare I=Imax;
  #while (I>-12)
    disc {
      <0, 0, 0> z, 100, 99
      translate <130*pow(-1,I), 0, 5*I>
      rotate z*2*360/Imax*I
      }
  #declare I=I-1; #end
  texture {
    pigment {color rgbt <1, 1, 1, 0.9999>}
    finish {
      ambient 0.3
      diffuse 1
      reflection 1
      specular 0.8
      phong 0.5
      brilliance 1
      }
    }
  no_shadow
  }

background {color rgb <0.1, 0.2, 0.3>}