Blinking light 3 times after a pause of 15 seconds

[rushi2711]

Hi I am trying to blink point light 3 times after a pause of 15 seconds. I am unable to do it within a for loop as all statements get executed all at once. Can anyone suggest whats wrong?

public int totalDuration;
public int noOfFlashes;
public string typeOfFlash;
public Light flashLight;

IEnumerator flashLightForBuoys(){

    for (int tempCounter = 0; tempCounter < 4; tempCounter++){

        if (typeOfFlash == "small")
        {
            StartCoroutine(waitForInterval(1));
        }
       
    }

    yield return new WaitForSeconds(15);

    StartCoroutine(flashLightForBuoys());
}

private IEnumerator waitForInterval(int waitTime)
{
    flashLight.enabled = true;
    Debug.Log("flashLight turned on 1" + flashLight.enabled);
    yield return new WaitForSeconds(waitTime);
    flashLight.enabled = false;
    Debug.Log("flashLight turned on 2" + flashLight.enabled);

}
private void Start()
{
    StartCoroutine(flashLightForBuoys());
}

}

[Hellium]

IEnumerator FlashLightForBuoys( int blinkCount = 1, float interval = 15, float onDuration = 1, float offDuration = 1 )
{
YieldInstruction onWait = onDuration < Mathf.Epsilon ? null : new WaitForSeconds(onDuration);
YieldInstruction offWait = offDuration < Mathf.Epsilon ? null : new WaitForSeconds(offDuration);
YieldInstruction intervalWait = interval < Mathf.Epsilon ? null : new WaitForSeconds(interval);

    while( true )
    {
        for ( int blinkIndex = 1 ; blinkIndex <= blinkCount ; ++blinkIndex )
        {
            if (typeOfFlash == "small")
            {
                flashLight.enabled = true;
                yield return onWait;
                flashLight.enabled = false;
                yield return offWait;
            }
        }
        yield return intervalWait;
    }
}

private void Start()
{
    StartCoroutine(FlashLightForBuoys( 3, 15, 1, 1 ));
}