#define stipple_width 24
#define stipple_height 24
static char stipple_bits[] = {
   0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa,
   0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa,
   0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa,
   0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa,
   0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa,
   0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa};