Light Rotation using C++

Hello,This is the first time for me to post in a forum and I hope that this will help me.
I need to ask how can I animate the light and make it rotate around a sphere…
I think it is easy but I can’t get it
Thank u in advance

There is a redbook sample for this here:

if you want to make the torus a sphere change the line that reads

glutSolidTorus (0.275, 0.85, 8, 15);

to something like this:

glutSolidSphere(1.0, 20, 20);

the part you are interested in is here:

   glPushMatrix ();
   glRotatef (spin, 1.0, 0.0, 0.0);
   glLightfv (GL_LIGHT0, GL_POSITION, position);

   glTranslated (0.0, 0.0, 1.5);
   glPopMatrix ();

which rotates the light by spin degrees at a distance of 1.5 from the sphere.

Thank u James very much =)