Self-destruction

Unity Engine
1

Good evening!
I am new at unity.
I have a bullet prefab which spawns and shoots when i press spacebar.
all clones have name bullet(clone).
How do i self-destroy bullet after 15 seconds?
Destroy(???,15);
Thanks in advance.

2

From a script on the bullet itself:

Destroy(gameObject, 15);

Or from your spacebar-press script:

var bulletInstance = Instantiate(BulletPrefab);
Destroy(bulletInstance, 15);

3

Thanks!