#define hex_width 16
#define hex_height 16
static char hex_bits[] = {
0x44, 0x44, 
0xaa, 0xaa, 
0x11, 0x11, 
0x11, 0x11, 
0x11, 0x11, 
0xaa, 0xaa, 
0x44, 0x44, 
0x44, 0x44, 
0x44, 0x44, 
0xaa, 0xaa, 
0x11, 0x11, 
0x11, 0x11, 
0x11, 0x11, 
0xaa, 0xaa, 
0x44, 0x44, 
0x44, 0x44, 

};