IEnumerator spawnMoreBunnies(float interval) { while (true) { Vector3 pos = Random.insideUnitSphere * radius; pos.y = 10.0f; Bunny bunny = GenerateBunny(pos); Rigidbody rb = bunny.GetComponent <Rigidbody>(); pos.y = 0.0f; rb.AddForce(-pos * 50f); yield return(new WaitForSeconds(interval)); } }