The color cannot be printed as desired by OpenGL.

GLfloat vertecies[] = { -0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, -0.1f, -0.1f, 0.1f, -0.1f,
                        0.1f, -0.1f, 0.1f, 0.1f, 0.1f, 0.1f, -0.1f, 0.1f, 0.1f, -0.1f, -0.1f, 0.1f,
                        0.1f, 0.1f, -0.1f, 0.1f, 0.1f, 0.1f, 0.1f, -0.1f, 0.1f, 0.1f, -0.1f, -0.1f,
                        -0.1f, -0.1f, 0.1f,-0.1f, 0.1f, 0.1f, -0.1f, 0.1f, -0.1f, -0.1f, -0.1f, -0.1f,
                        0.1f, -0.1f, 0.1f, -0.1f, -0.1f, 0.1f, -0.1f, -0.1f, -0.1f, 0.1f, -0.1f, -0.1f,
                        0.1f, 0.1f, -0.1f, 0.1f, -0.1f, -0.1f, -0.1f, -0.1f, -0.1f, 0.1f, 0.1f, 0.1f }; // Block Information

GLfloat color[] = { 1,0,0,
                    1,1,0,
                    1,0,0,
                    0,1,0,
                    0,0,1,
                    1,0,1,
                    0,1,1,
                    0.5, 0.5, 0.5 }; //Color information

GLubyte index[] = { 0,1,2,3,
                    4,5,6,7,
                    8,9,10,11,
                    12,13,14,15,
                    16,17,18,19,
                    20,21,22,23}; // order of vertices
void Block()
{
        glDrawElements(GL_QUADS,24, GL_UNSIGNED_BYTE, index);   
}

void Draw()
{
    glLoadIdentity();
    glPushMatrix();
        /*** Object conversion scheme ***/
        //Assume that the object is already drawn at the origin of the global coordinate system and convert to the global coordinate system
        glTranslatef(nx, 0.0, 0.0);
        glTranslatef(0.0, ny, 0.0);
        glTranslatef(0.0, 0.0, 0.0);

        glRotatef(xAngle, 1.0f, 0.0f, 0.0f);
        glRotatef(yAngle, 0.0f, 1.0f, 0.0f);
        glRotatef(zAngle, 0.0f, 0.0f, 1.0f);
        /********************/

        Block(); // hexahedron 
        //Cylinder();
    glPopMatrix();
}

void Display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear the background with the color you specified
    glPolygonMode(GL_FRONT_AND_BACK, GL_QUADS);
    glVertexPointer(3, GL_FLOAT, 0, vertecies);
    glColorPointer(3, GL_FLOAT, 0, color);
    glShadeModel(GL_FLAT);
    Draw();
    glFlush();
    // Run commands at once (immediately) by emptying the buffer
}

voidInit() // a function that initializes only once before entering the message loop on the main
{
    glClearColor (1.0, 1.0, 1.0, 0.0); // Specify Background Color - Default Black
    glEnable(GL_DEPTH_TEST);
    glEnableClientState(GL_VERTEX_ARRAY);
    glEnableClientState(GL_COLOR_ARRAY);
    /*
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
//  //  glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, light_direction);
    glLightfv(GL_LIGHT0, GL_AMBIENT, light_amibient);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
    */
}


void main(int argc, char** argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB); // Double Buffer | Default Color Mode Used by glut | Depth Buffer
    glutInitWindowPosition (0, 0); // where the window opens when running
    glutInitWindowSize (500, 500); // Window Workshop Size Area Settings, Window Size X
    glutCreateWindow("Graphics Lego Project");
    glutKeyboardFunc(Keyboard);
    glutSpecialFunc(SpecialKey);

//  //  glutMotionFunc();
//  //  glutPassiveMotionFunc();
    glutDisplayFunc(Display);
    Init();
    glutMainLoop();
}