How to display an object for just few seconds repeatedly in a scene?

Questions & Answers
1

I am making a VR video on the working of GNSS Satellite. My scene has an Earth and a satellite which is orbiting around the Earth. I want to show signal transmission from and to the satellite with the help of arrows. But these arrows ( one pointing from satellite to earth and other pointing from earth to satellite) should be visible only for the amount of time the satellite crosses their position. How can I do that? Kindly help please

2

For me normally the easiest way would be to use Time.deltaTime. See here:

float TimeAmount;
float currentTime;
GameObject arrow;

private void Start()
{
  currentTime = TimeAmount;
}

private void Update()
{
  currentTime -= Time.DeltaTime;

  if (currentTime <= 0)
  {
    if (arrow.activeSelf)
    {
      arrow.SetActive(false);
    }
    else
    {
      arrow.SetActive(true);
    }
    currentTime = TimeAmount;
  }
}
3

A simpler way is using a coroutine. For example:

public float TimeAmount;
public GameObject arrow;

void Start()
{
     StartCoroutine(ToggleArrow(TimeAmount));
}

IEnumerator ToggleArrow(float delay)
{
     while (true)
     {
          yield return new WaitForSeconds(delay);
          arrow.SetActive(true);

          yield return new WaitForSeconds(delay);
          arrow.SetActive(false);
     }
}

@niyativirmani13