I'm Making a Jumpscare script need help with time delay

Questions & Answers
1

this is my script I need help to add a time delay between the setActive(true) and SetActive(false)

public class jumpscare : MonoBehaviour {

public GameObject cake;
void OnTriggerEnter (Collider other)
    {
    cake.SetActive(true);
    

}
private void OnTriggerExit(Collider other)
{
    cake.SetActive(false);
}

},

2

Check what is coroutines in unity: Unity - Manual: Coroutines. It`s the easiest way to make delay.
Example:

        private void OnTriggerEnter(Collider other)
        {
            cake.SetActive(true);
            StartCoroutine(CakeDelay(2f));
        }
    
        private IEnumerator CakeDelay(float delay)
        {
            yield return new WaitForSecondsRealtime(delay);
            cake.SetActive(false);
        }

In ur case cake is becoming active on trigger enter, and non active on trigger exit.