// 'test_pattern', 24x32px
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0x33, 0x33, 0xcc, 0xcc, 
0x33, 0x33, 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 
0xf0, 0xf0, 0xf0, 0xf0, 0x33, 0x33, 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 
0xff, 0xff, 0xff, 0xff, 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0xfe, 0x00, 0x00, 0x00, 0x00, 
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x77, 0xfb, 0xfd, 0xfe, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff