#define stipple_width 16
#define stipple_height 16
static char stipple_bits[] = {
   0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00,
   0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00,
   0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00};