Choose a random animation from a list Play it When the animation reaches the end repeats the process

// Create a list of animations
class myAnimation : MonoBehaviour {
  public List<Sprite> animList = new List<Sprite>();
  
  void Start() {
    // Creates a random number
    int rand = Random.Range(0, animList.Count);
    // Sets the sprite to a random animation
    GetComponent<SpriteRenderer>().sprite = animList[rand];
    
  }
}