#version 3.7;
camera {
  location 2*<0.02,-8,3>
  look_at <0,0,0>
  up <0,0,1>
  right <1,0,0>
  sky <0,0,1>
  angle 30
}

global_settings {
  max_trace_level 16
  assumed_gamma 2.2
}

background {
  color rgb <1,1,1>
}

light_source {
  <5,-5,5>
  color rgb 1
}


#declare sweep=sphere_sweep {
  linear_spline
  #local uu=-2;
  #local maxu=7;
  maxu+4,
  #while(uu<maxu+2)
    #local phi=uu/maxu*2*pi;
    3*vnormalize(<1,-2,1>+0.4*<cos(phi),sin(phi),sin(phi)>),0.05
    #local uu=uu+1;
  #end
}

object {
  sweep
  texture {
    pigment {
      color rgb <0,0,1>
    }
  }
}
object {
  sweep
  scale <-1,-1,-1>
  texture {
    pigment {
      color rgb <1,0,0>
    }
  }
}