smart-bow-infrared/Assets/FruitMaster/Scripts/StainBehaviour.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;



public class StainBehaviour : MonoBehaviour
{
    const float StainLifetime = 2.0f;

    private float Lifetime = 0f;
    private Image StainImage;
    // Start is called before the first frame update
    void Start()
    {
        StainImage = gameObject.GetComponent<Image>();
        Debug.Assert(StainImage != null);
    }

    // Update is called once per frame
    void Update()
    {
        if (Lifetime > StainLifetime)
        {
            Destroy(gameObject);
        }
        else
        {
            StainImage.color = new Color(1f, 1f, 1f, (StainLifetime - Lifetime) / StainLifetime);
            Lifetime += Time.deltaTime;
        }
    }
}