- data[(y * 8 + x) * 4 + 0] =
- data[(y * 8 + x) * 4 + 1] =
- data[(y * 8 + x) * 4 + 2] = (y < 8) ^ (x < 8) ? 128 : 64;
- data[(y * 8 + x) * 4 + 3] = 255;
+ data[(y * 16 + x) * 4 + 0] =
+ data[(y * 16 + x) * 4 + 1] =
+ data[(y * 16 + x) * 4 + 2] = (y < 8) ^ (x < 8) ? 128 : 64;
+ data[(y * 16 + x) * 4 + 3] = 255;