draw_sym(dr, ds, state->w, state->h, NEGATIVE, ink);
for (which = POSITIVE, j = 0; j < 2; which = OPPOSITE(which), j++) {
for (i = 0; i < w; i++) {
draw_sym(dr, ds, state->w, state->h, NEGATIVE, ink);
for (which = POSITIVE, j = 0; j < 2; which = OPPOSITE(which), j++) {
for (i = 0; i < w; i++) {