#define squaremask_width 16
#define squaremask_height 16
static unsigned char squaremask_bits[] = {
   0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f,
   0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f,
   0xff, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};