Recreating an Old “Dirty Gamedev Trick” (2019)(kylehalladay.com)

    /* Munching squares, generalized to TrueColor. */

    #include <yeso.h>

    int main()
    {
      ywin w = yw_open("munching squares", yp_p(1024, 1024), "");

      for (int t = 0;; t++) {
        ypic fb = yw_frame(w);
        for (int y = 0; y < fb.size.y; y++) {
          ypix *p = yp_line(fb, y);
          for (int x = 0; x < fb.size.x; x++) p[x] = (t & 1023) - ((x ^ y) & 1023);
        }

        yw_flip(w);
      }
    }