How do I spawn repeatedly object whot 0.1 seconds between them?

Question

I want to spawn a 100 object whit 0.1 seconds in between. I have this but they still spawn all at once.

private float timer = 0.0f;
bool goSpawn = false;
private void Update()
{
    if (goSpawn)
    {
        timer += Time.deltaTime;
    }
}
public void spawnAnimals()
{
    goSpawn = true;
    for (int i = 0; i < 100;)
    {
        if (timer > 2f)
        {
            RndSpawnPos = new Vector3(Random.Range(3.30f, 5.70f), 0.78f, Random.Range(-3.00f, 3.01f));
            Instantiate(animal, RndSpawnPos, Quaternion.identity);
            i++;
            timer = 0.0f;
        }
    }
}