#define spiral_width 16
#define spiral_height 16
static char spiral_bits[] = {
0xfe, 0xff, 
0x02, 0x80, 
0xfa, 0xbf, 
0x0a, 0xa0, 
0xea, 0xaf, 
0x2a, 0xa8, 
0xaa, 0xab, 
0xaa, 0xaa, 
0xaa, 0xaa, 
0x2a, 0xaa, 
0xea, 0xab, 
0x0a, 0xa8, 
0xfa, 0xaf, 
0x02, 0xa0, 
0xfe, 0xbf, 
0x00, 0x80, 

};