#SNG: This is a sample stimulus IHDR: { width: 20; height: 20; bitdepth: 8; using grayscale; } bKGD {gray: 0;} tEXt: { keyword: "Title"; text: "Sample SNG stimulus"; } IMAGE: { pixels hex 0000000000000000000000000000000000000000 0000000000000000000000000000000000000000 0000000000000000000000000000000000000000 0000000000000000ffffffa08000000000000000 00000000000000ffffffffffa080000000000000 000000000000ffff800000ffffa0800000000000 0000000000ffff8000000000ffffa08000000000 0000000000ffff8000000000ffffa08000000000 000000000000ffff000000ffffa0800000000000 00000000000000000000ffffa080000000000000 000000000000000000ffffa08000000000000000 0000000000000000ffffa0800000000000000000 0000000000000000ffffa0800000000000000000 0000000000000000000000000000000000000000 000000000000000000ffa0000000000000000000 0000000000000000ffffffa00000000000000000 0000000000000000ffffffa00000000000000000 000000000000000000ffa0000000000000000000 0000000000000000000000000000000000000000 0000000000000000000000000000000000000000 }