glBegin(GL_LINES);

                glVertex3f(array[i][j][0], array[i][j][1] - 5, array[i][j][2]);
                glVertex3f(array[i + 1][j][0], array[i + 1][j][1] - 5, array[i + 1][j][2]);

                glEnd();

                glBegin(GL_LINES);

                glVertex3f(array[i][j][0], array[i][j][1] - 5, array[i][j][2]);
                glVertex3f(array[i][j + 1][0], array[i][j + 1][1] - 5, array[i][j + 1][2]);

                glEnd();