#define ladder_width 16
#define ladder_height 16
static char ladder_bits[] = {
   0xfc, 0x3f, 0x14, 0x28, 0x14, 0x28, 0x14, 0x28, 0xf4, 0x2f, 0x14, 0x28,
   0x14, 0x28, 0x14, 0x28, 0xf4, 0x2f, 0x14, 0x28, 0x14, 0x28, 0x14, 0x28,
   0xf4, 0x2f, 0x14, 0x28, 0x14, 0x28, 0x1c, 0x38};