Travel_Run/Assets/Scripts/Flow/FlowIntroFloatMotion.cs

using UnityEngine;

public class FlowIntroFloatMotion : MonoBehaviour
{
    public Vector2 amplitude = Vector2.zero;
    public Vector2 frequency = Vector2.one;
    public float phase = 0f;
    public float scalePulse = 0f;

    private RectTransform rectTransform;
    private Vector2 basePosition;
    private Vector3 baseScale;

    private void Awake()
    {
        rectTransform = GetComponent<RectTransform>();
        if(rectTransform != null)
        {
            basePosition = rectTransform.anchoredPosition;
            baseScale = rectTransform.localScale;
        }
    }

    private void OnEnable()
    {
        if(rectTransform == null)
        {
            rectTransform = GetComponent<RectTransform>();
        }

        if(rectTransform != null)
        {
            basePosition = rectTransform.anchoredPosition;
            baseScale = rectTransform.localScale;
        }
    }

    private void Update()
    {
        if(rectTransform == null)
        {
            return;
        }

        float time = Time.unscaledTime + phase;
        Vector2 offset = new Vector2(
            Mathf.Sin(time * frequency.x) * amplitude.x,
            Mathf.Sin(time * frequency.y) * amplitude.y);

        rectTransform.anchoredPosition = basePosition + offset;

        if(scalePulse > 0f)
        {
            float scale = 1f + (Mathf.Sin(time * 5.2f) * scalePulse);
            rectTransform.localScale = baseScale * scale;
        }
    }
}