// 'test_pattern', 32x24px
0x33, 0x33, 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x30, 0x30, 0xc0, 0xc0, 0x3f, 0x3f, 0xcf, 0xcf, 0x30, 0x30, 0xc0, 0xc0, 0x3f, 0x3f, 0xcf, 0xcf, 
0x07, 0x0b, 0x0d, 0x0e, 0x0f, 0x0f, 0x0f, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xff, 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0xfe, 0xff, 0xff, 0xff, 0xfe