// 'test_pattern', 32x24px
0xb3, 0x33, 0x0f, 0xff, 0x33, 0x33, 0x0f, 0xff, 0xcc, 0xcc, 0x0f, 0xff, 0xcc, 0xcc, 0x0f, 0xff, 
0x33, 0x33, 0x0f, 0xff, 0x33, 0x33, 0x0f, 0xff, 0xcc, 0xcc, 0x0f, 0xff, 0xcc, 0xcc, 0x0f, 0xff, 
0x33, 0x33, 0x0f, 0xff, 0x33, 0x33, 0x0f, 0xff, 0xcc, 0xcc, 0x0f, 0xff, 0xcc, 0xcc, 0x0f, 0xff, 
0xff, 0x0f, 0x7f, 0xff, 0xff, 0x0f, 0xbf, 0xff, 0xff, 0x0f, 0xdf, 0xff, 0xff, 0x0f, 0xef, 0xff, 
0xff, 0x0f, 0xf7, 0xff, 0xff, 0x0f, 0xfb, 0xff, 0xff, 0x0f, 0xfd, 0xff, 0xff, 0x0f, 0xfe, 0xff, 
0xff, 0x0f, 0xff, 0x7f, 0xff, 0x0f, 0xff, 0xbf, 0xff, 0x0f, 0xff, 0xdf, 0xff, 0x0f, 0xff, 0xee