#define mem_width 16
#define mem_height 16
static char mem_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x38, 0x07, 0x78, 0x0f, 0xf0, 0x1f,
   0x20, 0x1c, 0x10, 0x18, 0x18, 0x10, 0x18, 0x10, 0x18, 0x10, 0xd8, 0x0f,
   0xe8, 0x0f, 0xe8, 0x07, 0x00, 0x00, 0x00, 0x00};