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

public class SinAlpha : MonoBehaviour
{
    [SerializeField] private float speed = 1;
    [SerializeField, Range(0, 1)] private float amplitude = 0.5f;
    [SerializeField] private Graphic image;

    void Update()
    {
        Color c = image.color;
        c.a = amplitude + amplitude * Mathf.Sin(Time.time * speed)/2;
        image.color = c;
    }
}