#define cannon_width 13
#define cannon_height 8
static unsigned char cannon_bits[] = {
   0x00, 0x00, 0x40, 0x00, 0xe0, 0x00, 0xe0, 0x00, 0xfc, 0x07, 0xfe, 0x0f,
   0xfe, 0x0f, 0xfe, 0x0f };