#define envelope_width 11
#define envelope_height 11
static unsigned char envelope_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0xfe, 0x03, 0x06, 0x03, 0x8a, 0x02, 0x72, 0x02,
   0x22, 0x02, 0x02, 0x02, 0xfe, 0x03, 0x00, 0x00, 0x00, 0x00};