void display(void)
{    int z = 90;
     int x = 1;
   glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glMatrixMode(GL_MODELVIEW);
   glutSolidSphere (0.5, 400, 400);
     glLoadIdentity();
     
     while(x == 1) {
    int y = z++;
      glRotatef(y, 1, 0, 0);
         glFlush ();
         }
         
}