invoke repeating in start code example
Example: unity interval timer
public Rigidbody projectile;
void Start(){
//(methodname, timeUntilFirstCall, repeatTime)
InvokeRepeating("LaunchProjectile", 2.0f, 0.3f); //time needs to be > 0
}
void LaunchProjectile(){
Rigidbody instance = Instantiate(projectile);
instance.velocity = Random.insideUnitSphere * 5;
}