#define grey_width 16
#define grey_height 16
static char grey_bits[] = {
0x55, 0x55, 
0xaa, 0xaa, 
0x55, 0x55, 
0xaa, 0xaa, 
0x55, 0x55, 
0xaa, 0xaa, 
0x55, 0x55, 
0xaa, 0xaa, 
0x55, 0x55, 
0xaa, 0xaa, 
0x55, 0x55, 
0xaa, 0xaa, 
0x55, 0x55, 
0xaa, 0xaa, 
0x55, 0x55, 
0xaa, 0xaa, 

};