#define volume_width 10
#define volume_height 10
static unsigned char volume_bits[] = {
   0x00, 0x00, 0x00, 0x01, 0xa0, 0x01, 0xac, 0x01, 0xae, 0x01, 0xae, 0x01,
   0xac, 0x01, 0xa0, 0x01, 0x00, 0x01, 0x00, 0x00};