Unity animation not working as desired - animation

Question

Im trying to make a dynamic menu animation in Unity 2017 (instantiate menu element-> play animation -> wait animation ends -> repeat)
My goal is to create an effect of sequentially adding items one below another, waiting for the last one to finish and then add the next one
This is working fine, but it has a fixed time between menu items:
Code:
IEnumerator GetJsonBrands()
{
string url = "http://test.com";
GameObject newObj;
WWW www = new WWW(url);
yield return www;
if (string.IsNullOrEmpty(www.error))
{
jsonData = www.text;
}
JSONNode jsonNode = SimpleJSON.JSON.Parse(jsonData);
int BrandQty = int.Parse(jsonNode["content"]["brands"]);
bool leftpos = true;
for (int i = 0; i < BrandQty; i++)
{
if (leftpos)
{
// Instantiate Left Prefab
newObj = (GameObject)Instantiate(LeftBrand, transform);
leftpos = false;
}
else
{
// Instantiate Right Prefab
newObj = (GameObject)Instantiate(RightBrand, transform);
leftpos = true;
}
Animator anim = newObj.transform.GetChild(0).GetComponent<Animator>();
anim.Play("test");
yield return new WaitForSeconds(0.5f);
Debug.Log("finished");
}
}
I think this is a more correct solution, but it doesn't work, all the menu items are appearing and animating at the same time:
IEnumerator GetJsonBrands()
{
string url = "http://test.com";
GameObject newObj;
WWW www = new WWW(url);
yield return www;
if (string.IsNullOrEmpty(www.error))
{
jsonData = www.text;
}
JSONNode jsonNode = SimpleJSON.JSON.Parse(jsonData);
int BrandQty = int.Parse(jsonNode["content"]["brands"]);
bool leftpos = true;
for (int i = 0; i < BrandQty; i++)
{
if (leftpos)
{
// Instantiate Left Prefab
newObj = (GameObject)Instantiate(LeftBrand, transform);
leftpos = false;
}
else
{
// Instantiate Right Prefab
newObj = (GameObject)Instantiate(RightBrand, transform);
leftpos = true;
}
Animator anim = newObj.transform.GetChild(0).GetComponent<Animator>();
anim.Play("test");
//Wait until Animator is done playing
while (anim.GetCurrentAnimatorStateInfo(0).IsName("test") &&
anim.GetCurrentAnimatorStateInfo(0).normalizedTime < 1.0f)
{
Debug.Log("running");
//Wait every frame until animation has finished
yield return null;
}
Debug.Log("finished");
}
}
What am i doing wrong?