Mea culpa, I sent you the fixed version...
I meant, try this:

#version unofficial megapov 0.7;

global_settings {
ambient_light 0
radiosity {}
ini_option "+qr"
}

box {-1,1
scale 12
pigment {rgb 1}}

light_source {
<0,0,0>
rgb 0.7}

#declare oggetto=0;  // 0 sphere_sweep, 1 torus

#if (!oggetto)
sphere_sweep {
catmull_rom_spline_sphere_sweep
6,
<1,0,0>,.1
<0,0,1>,.1
<-1,0,0>,.1
<0,0,-1>,.1
<1,0,0>,.1
<0,0,1>,.1
pigment {rgb x+y}
scale 2
translate -y}

#else

torus {1,0.1
pigment {rgb x+y}
scale 2
translate -y}

#end

camera {location <0,0,-5> look_at 0}

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