Material instancing test

using UnityEngine;

public class MaterialTest : MonoBehaviour
{
    private Material _mat;

    void Start()
    {
        _mat = GetComponent<Renderer>().material;
    }

    void Update()
    {
        var col = _mat.color;
        col.r = Mathf.PingPong(Time.time, 1f);
        _mat.color = col;
    }
}