#define shelf_width 16
#define shelf_height 16
static char shelf_bits[] = {
   0xe0, 0x0f, 0xe0, 0x0f, 0x00, 0x1c, 0xee, 0x1d, 0xee, 0x19, 0xee, 0x39,
   0xee, 0x39, 0xee, 0x31, 0xee, 0x71, 0xee, 0x71, 0xee, 0x61, 0xee, 0xe1,
   0xee, 0xe1, 0x0e, 0xc0, 0xee, 0xc1, 0xff, 0xff};