#define triangle_width 16
#define triangle_height 16
static char triangle_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x01, 0x80, 0x01, 0x40, 0x02,
   0x40, 0x02, 0x20, 0x04, 0x20, 0x04, 0x10, 0x04, 0x10, 0x08, 0x08, 0x08,
   0x08, 0x10, 0x04, 0x10, 0x04, 0x20, 0xfc, 0x3f};