I want to specify the location of spawning

i want my enemies spawn at just one of 3 areas on x axis like 0 and 2 and -2 i don't want them to spawn like -1 or 1 what should i do

code im using

public GameObject obstacle; private float startDelay = 2f; private float cloningSpeed = 0.1f; public float[] spawnRadius; void Start() { InvokeRepeating("clone", startDelay, cloningSpeed); }

 void Update()
 {
     
 }

 private void clone()
 {
     Instantiate(obstacle, new Vector3(Random.Range(-2,spawnRadius.Length),1,80), transform.rotation);
 }