#define spacer_width 16
#define spacer_height 8
static char spacer_bits[] = {
   0xc0, 0x03, 0xf0, 0x0f, 0xf8, 0x1f, 0xfc, 0x3f, 0xb6, 0x6d, 0xff, 0xff,
   0x1c, 0x38, 0x08, 0x10};