int iteration, xs,ys;
for (ys = 0, y0 = -1; ys < screen->h;
y0 += 2 / (double)screen->h, ys++) {
for (xs = 0, x0 = -2.5; xs < screen->w;
x0 += 3 / (double)screen->w, xs++) {
int iteration, xs,ys;
for (ys = 0, y0 = -1; ys < screen->h;
y0 += 2 / (double)screen->h, ys++) {
for (xs = 0, x0 = -2.5; xs < screen->w;
x0 += 3 / (double)screen->w, xs++) {