Flatten[Position [(1 + {1, -1, -1, 1, 1, -1, -1, 1}), 2]]
{1, 4, 5, 8}
Flatten[Position [(1 + {1, -1, -1, 1, 1, -1, -1, 1}), 0]]
{2, 3, 6, 7}
https://oeis.org/search?q=1%2C+4%2C+5%2C+8&sort=&language=&go=Search
https://oeis.org/search?q=2%2C+3%2C+6%2C+7&sort=&language=&go=Search