Color cycling example

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

/* This script expects a stadard color eg. Color or Albedo in the shader. Use Particles/Stadard Unlit for best results*/

public class General_Blinker : MonoBehaviour {

    public Color dimColor;
    public Color midColor;
    public Color brightColor;
    public Color blinkerColor;
    public Renderer objectRenderer;
    public float repeatRate;
    public bool blinkerOn;

    void OnEnable () {
        objectRenderer = this.GetComponent<Renderer>(); //get renderer of object we are blinking
    }
    void OnDisable () {
        blinkerOn = false; //disable blinking when object is enabled so we are only calling the routine loop once
    }

    // Update is called once per frame
    void Update () {
        //only call this if blinkerOn is disabled, so we only run Blinker() once
        if(!blinkerOn){
            Blinker(dimColor, midColor, repeatRate);
        }
    }

    void Blinker(Color startColor, Color endColor, float duration){
        blinkerOn = true;
        StartCoroutine(colorAnimator(startColor, endColor, (repeatRate/4)));
    }

    IEnumerator colorAnimator (Color startColor, Color endColor, float duration){
        float time = 0;
        while (time < duration){
                blinkerColor = Color.Lerp(startColor, endColor, time/duration); //lerp the colors from dark to mid
                objectRenderer.material.SetColor("_Color", blinkerColor); //get the color of the material and set it to our current lerped value
                time += Time.deltaTime;
                yield return null;
            }
        StopCoroutine("colorAnimator");
        blinkerColor = endColor; //make sure we have hit the target color so if/else block doesn't fail

        if (blinkerColor == midColor){

            StartCoroutine(colorAnimator(midColor, brightColor, repeatRate)); //call the routine again to lerp the color back from mid to bright
        }
        else if(blinkerColor == brightColor){
            StartCoroutine(colorAnimator(brightColor, dimColor, repeatRate)); //call the routine again to lerp the color back from bright to dark
        }
        else if(blinkerColor == dimColor){
            Blinker(dimColor, midColor, repeatRate); //if we are back at dark, rerun Blinker() to start the cycle again
        }
    }
}