Random Color Change - C# MonoBehaviour Unity 2018

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

/// <summary>
/// Randomly assign a color to the sprite renderer
/// </summary>
[RequireComponent(typeof(SpriteRenderer))]
public class ChangeColor : MonoBehaviour
{
    private SpriteRenderer spriteRenderer;
    public float timeToChange = 0.1f;
    private float timeSinceChange = 0f;

    private void Awake()
    {
        spriteRenderer = GetComponent<SpriteRenderer>();
    }

    // Update is called once per frame
    private void Update()
    {
        timeSinceChange += Time.deltaTime;

        // Make sure the sprite renderer is set
        if (spriteRenderer != null && timeSinceChange >= timeToChange)
        {
            Color newColor = new Color(
                    Random.value,
                    Random.value,
                    Random.value
                );

            // It's been set
            spriteRenderer.color = newColor;
            timeSinceChange = 0f;
        }
    }
}