glPushAttrib(GL_ALL_ATTRIB_BITS);

        glDisable(GL_TEXTURE_2D);
        glBindTexture(GL_TEXTURE_2D, 0);
        glDisable(GL_CULL_FACE);
        glDisable(GL_LIGHTING);
        glDepthFunc(GL_ALWAYS);

        glDepthRange(0, 0);

        glLineWidth(2);
        glColor3ub(255, 255, 255);

        glBegin(GL_LINES);
        glVertex3f(1, 0, 0);
        glVertex3f(1, -1, 0);

        glVertex3f(0, 0, 0);
        glVertex3f(1, 0, 0);

        glVertex3f(0, 0, 0);
        glVertex3f(0, -1, 0);

        glVertex3f(0, -1, 0);
        glVertex3f(1, -1, 0);

        glVertex3f(1, -1, 0);
        glVertex3f(1, -1, -1);

        glVertex3f(1, -1, -1);
        glVertex3f(1, 0, -1);

        glVertex3f(1, -1, -1);
        glVertex3f(0, -1, -1);

        glVertex3f(0, -1, -1);
        glVertex3f(0, -1, 0);

        glVertex3f(0, -1, -1);
        glVertex3f(0, 0, -1);

        glVertex3f(0, 0, -1);
        glVertex3f(1, 0, -1);

        glVertex3f(0, 0, -1);
        glVertex3f(0, 0, 0);

        glVertex3f(1, 0, -1);
        glVertex3f(1, 0, 0);

        glEnd();

        glPopAttrib();