void DrawScene()
{

    glClear(GL_COLOR_BUFFER_BIT);

    glBegin(GL_QUADS);

    double wsp_max=100.0f;

    glColor3f(1.0f, 1.0f, 1.0f);
    glVertex2f(-wsp_max, -wsp_max);
    //glColor3f(0.0f, 1.0f, 1.0f);
    glVertex2f(-wsp_max, wsp_max);
    //glColor3f(1.0f, 0.0f, 1.0f);
    glVertex2f(wsp_max, wsp_max);
    //glColor3f(0.0f, 1.0f, 1.0f);
    glVertex2f(wsp_max, -wsp_max);

    glColor3f(0.0f, 0.0f, 0.0f);
    glVertex2f(-wsp_max/3, -wsp_max/3);
    //glColor3f(0.0f, 0.0f, 0.0f);
    glVertex2f(-wsp_max/3, wsp_max/3);
    //glColor3f(0.0f, 0.0f, 1.0f);
    glVertex2f(wsp_max/3, wsp_max/3);
    //glColor3f(0.0f, 0.0f, 1.0f);
    glVertex2f(wsp_max/3, -wsp_max/3);

    double p;
    p=2*wsp_max/3;
    double s=1.f;
    s=2*wsp_max/9;
    double x;
    double y;

    for(int i =0; i<4; i++)
    {
        for(x=0; x<2*wsp_max; x=x+3*s)
        {
            for(y=0; y<2*wsp_max; y=y+3*s)
            {
                //glBegin(GL_QUADS);
                //glColor3f(0.0f, 1.0f, 0.0f);
                glVertex2f(-wsp_max+p/3+x, -wsp_max+p/3+y);
                //glColor3f(1.0f, 0.0f, 0.0f);
                glVertex2f(-wsp_max+p/3+x, -wsp_max+p/3+s+y);
                //glColor3f(1.0f, 0.0f, 1.0f);
                glVertex2f(-wsp_max+p/3+s+x, -wsp_max+p/3+s+y);
                //glColor3f(0.0f, 1.0f, 0.0f);
                glVertex2f(-wsp_max+p/3+s+x, -wsp_max+p/3+y);
                //glEnd();

            }
        }
        s/=3;
        p/=3;
    }
    glEnd();
    glFlush();

}