Ripple effect in Unity

Ripple.cs

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

public class Ripple : MonoBehaviour
{



    //preset

    public GameObject square;
    public Gradient g;
    public int number = 50;
    int numHalf;
    List<GameObject> list = new List<GameObject>();
    public float xWave = 1.38f, yWave = 0.26f;
    public float scale = 1f;
    Vector3 offset = new Vector3(0,0,10);
    Vector3 mousePos;
    float timer;
   

    void Start()
    {

        numHalf = number / 2;

        for (int x = -numHalf; x < numHalf; x++)
        {
            for (int y = -numHalf; y < numHalf; y++)
            {
                GameObject s =  Instantiate(square, new Vector2(x , y ), Quaternion.identity);
                s.GetComponent<SpriteRenderer>().color = g.Evaluate(     (Mathf.Cos( s.transform.position.x / xWave + s.transform.position.y / yWave) + 1 ) /2   );
                list.Add( s );
            }
        }

    }

    private void Update()
    {
        mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition) + offset;
        timer += Time.deltaTime;

        foreach (GameObject s in list)
        {
            s.GetComponent<SpriteRenderer>().color = g.Evaluate((Mathf.Cos(timer+  s.transform.position.x / xWave + Mathf.Cos(   s.transform.position.y / yWave )) + 1) / 2);
            s.transform.localEulerAngles = new Vector3 (0f, 0f, 50 * (Mathf.Cos(s.transform.position.x / xWave + Mathf.Cos(s.transform.position.y / yWave)) + 1) / 2);
            float dist= Vector2.Distance(mousePos, s.transform.position);
            s.transform.localScale = new Vector3(1,1,1) *  Mathf.Cos( dist + timer )/ scale;

        }

    }

}