Check if object was enabled

Questions & Answers
1

In my game I have a clock. When I press Esc, I open main menu and disable clock (images of the numbers and script, which make clock going). And when I press Esc again, clock became visible, but it don’t going because I launched coroutines in the script (in Start function) and after disable/enable object it didn’t launched again.

So is it any way to check in the script if object was enabled?
But not in Update function (with activeSelf), because I need to check if object enabled and launch coroutine only one time.

My code can’t restart coroutine, after it’s parent object was disabjed:

bool isClockStarted;

void Update()
{        
    if(gameObject.activeSelf &&
       !isClockStarted)
    {
        StartCoroutine("Time000X");
        StartCoroutine("Time00X0");
        StartCoroutine("Time0X00");
        StartCoroutine("TimeX000");

        isClockStarted = true;
    }

    if(Input.GetKeyDown(KeyCode.Escape))
        isClockStarted = false;
}
2

Use OnEnable