#include<GL/glut.h>
float angle=0;
void display()
{
glEnable(GL_DEPTH_TEST);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   
glPushMatrix();
    glRotatef(angle,0,1,0);
   
     glPushMatrix();
      glTranslatef(0,0.3,0);
glColor3f(0,0,1);
glutSolidSphere(0.3,30,30);

glColor3f(1,1,1);
glTranslatef(0, -0.1, 0.1);
glutSolidSphere(0.25,30,30);

glColor3f(1,1,1);
    glTranslatef(0, -0.1, 0.1);
  glutSolidSphere(0.25, 30,30);
  glPopMatrix();
 
  glPushMatrix();
    glColor3f(1,1,1);
    //glutSolidSphere(0.2,30,30);
glPopMatrix();
glPopMatrix();

glutSwapBuffers();    
}
void idle()
{
  angle++;
  glutPostRedisplay();
}
const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };


int main()
{
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week08");
glutDisplayFunc(display);
glutIdleFunc(idle);

glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);

    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);



glutMainLoop();
}