duck

float reelPos;

void MoveReel()
{
    reelPos += ReelSpeed;

    for (int x = 0; x < Symbols.Length; x++)
    {
                float symbolPos = reelPos + (x * symbolHeight);
        float wrappedPos = Mathf.Repeat(symbolPos, Symbols.Length * symbolHeight);
        Symbols[x].transform.position = new Vector3(transform.position.x, wrappedPos ,transform.position.z);
    }
}