SplineWalker.cs

using UnityEngine;

public class SplineDecorator : MonoBehaviour
{

    public BezierSpline spline;

    public int frequency;

    public bool lookForward;

    public Transform[] items;

    private void Awake()
    {
        if (frequency <= 0 || items == null || items.Length == 0)
        {
            return;
        }
        float stepSize = 1f / (frequency * items.Length);
        if (spline.Loop || stepSize == 1)
        {
            stepSize = 1f / stepSize;
        }
        else
        {
            stepSize = 1f / (stepSize - 1);
        }
        
        for (int p = 0, f = 0; f < frequency; f++)
        {
            for (int i = 0; i < items.Length; i++, p++)
            {
                Transform item = Instantiate(items[i]) as Transform;
                Vector3 position = spline.GetPoint(p * stepSize);
                item.transform.localPosition = position;
                if (lookForward)
                {
                    item.transform.LookAt(position + spline.GetDirection(p * stepSize));
                }
                item.transform.parent = transform;
            }
        }
    }
}