My gameobject dosent spawn

Questions & Answers
1

using UnityEngine;
using System.Collections;

public class spawning : MonoBehaviour {

public GameObject block1;
public GameObject block2;
public GameObject block3;
public GameObject block4;
public GameObject block5;
public GameObject block6;
public bool spawned; 
public float chooser;
public float seconds;

void Start () {
	chooser = Random.Range (1, 6);
	seconds = Random.Range (1, 5);
}

void Update () {
	spawnernumerator ();
}

IEnumerator spawnernumerator()
{
	while (true) {
		chooser = Random.Range (1, 6);
		seconds = Random.Range (1, 5);

		if (chooser == 1) {
			Instantiate (block1, transform.position, Quaternion.identity);
		}
		if (chooser == 2) {
			Instantiate (block2, transform.position, Quaternion.identity);
		}
		if (chooser == 3) {
			Instantiate (block3, transform.position, Quaternion.identity);
		}
		if (chooser == 4) {
			Instantiate (block4, transform.position, Quaternion.identity);
		}
		if (chooser == 5) {
			Instantiate (block5, transform.position, Quaternion.identity);
		}
		if (chooser == 6) {
			Instantiate (block6, transform.position, Quaternion.identity);
		}

		yield return new WaitForSeconds (seconds);

	}
	yield return new WaitForSeconds (seconds);

}

}

The problem is that values for chooser and seconds dont change and also gameojbects dont spawn , in inspector I put all gameobjects into slots .

2

void Update () {
StartCoroutine(spawnernumerator());
}

3

You should call the coroutine inside of you Start method because you already have a game loop inside your coroutine.
So you should write:
void Start() { chooser = Random.Range (1, 6); seconds = Random.Range (1, 5); StartCoroutine(spawnernumerator()); }