#define grid_diag8_width 16
#define grid_diag8_height 16
static char grid_diag8_bits[] = {
   0xff, 0xfe, 0x7f, 0xfd, 0xbf, 0xfb, 0xdf, 0xf7, 0xef, 0xef, 0xf7, 0xdf,
   0xfb, 0xbf, 0xfd, 0x7f, 0xfe, 0xff, 0xfd, 0x7f, 0xfb, 0xbf, 0xf7, 0xdf,
   0xef, 0xef, 0xdf, 0xf7, 0xbf, 0xfb, 0x7f, 0xfd};