// 'test_pattern', 32x24px
0x33, 0x33, 0x15, 0x57, 0x33, 0x33, 0x02, 0xbf, 0xcc, 0xcc, 0x15, 0x57, 0xcc, 0xcc, 0x00, 0xff, 
0x33, 0x33, 0x15, 0x57, 0x33, 0x33, 0x02, 0xbf, 0xcc, 0xcc, 0x15, 0x57, 0xcc, 0xcc, 0x00, 0xff, 
0x33, 0x33, 0x15, 0x57, 0x33, 0x33, 0x02, 0xbf, 0xcc, 0xcc, 0x15, 0x57, 0xcc, 0xcc, 0x00, 0xff, 
0x55, 0x1f, 0x7f, 0xff, 0x2b, 0x0f, 0xbf, 0xff, 0x55, 0x0f, 0xdf, 0xff, 0x0a, 0x0f, 0xef, 0xff, 
0x55, 0x1f, 0xf7, 0xff, 0x2b, 0x0f, 0xfb, 0xff, 0x55, 0x0f, 0xfd, 0xff, 0x0a, 0x0f, 0xfe, 0xff, 
0x55, 0x1f, 0xff, 0x7f, 0x2b, 0x0f, 0xff, 0xbf, 0x55, 0x0f, 0xff, 0xdf, 0x0a, 0x0f, 0xff, 0xee