black painted stairs with runner

2 x 3 3 x 5 4 x 6 5 x 8 6 x 9 7 x 9 8 x 10 9 x 12 10 x 14 12 x 15 3 4 RoundSquare 5 6 RoundSquare 7 8 RoundSquare 9 10 RoundSquar…