c++ - Ball of Light (Light, Material?) glutsolidsphere -

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i'm programming game called falldown. i'm finished; want design ball. how can light ball such glows these examples?

enter image description here

enter image description here

i created cube glutsolidsphere , ask myself how can light ball. 

void ball() {     glcolor4f(0, 0, 0.5, 0.5);     glutsolidsphere(0.25,40,40);         }  void initlightsources() {      ??????        glenable( gl_lighting );      glenable(gl_depth_test);      glenable( gl_light0 ); }


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