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hi guys im trying to remake flappy bird game and im using a script for obsticales, the problem is i dont have any public variables in my inspector,i had noticed this before in all of my other scripts but i didnt have to use it till now plz help. im new to this program and i helpd myself making this with yt video and that guy had all of the variables.
hers my script:

using UnityEngine;
using System.Collections;

public class Obstacle_Controller : MonoBehaviour {
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		count = Random.Range (1,7);
		if (col.gameObject.tag == "Obstacles"){
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			if (count == 2)
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			{
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				Instantiate (obj6, obj_Position.transform.position, Quaternion.identity);
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}
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using UnityEngine;
using System.Collections;

public class Obstacle_Controller : MonoBehaviour {
	public GameObject obj1;
	public GameObject obj2;
	public GameObject obj3;
	public GameObject obj4;
	public GameObject obj5;
	public GameObject obj6;
	public GameObject obj7;
	public GameObject obj_Position;
	int count=0;
	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
	
	}
	void OnTriggerEnter2D (Collider2D col)
	{
		count = Random.Range (1,4);
		if (col.gameObject.tag == "Obstacles"){
			if (count == 1)
			{
				Instantiate (obj1, obj_Position.transform.position, Quaternion.identity);
			}
			else
			if (count == 2)
			{
				Instantiate (obj2, obj_Position.transform.position, Quaternion.identity);
			}
			else
			if (count == 3)
			{
				Instantiate (obj3, obj_Position.transform.position, Quaternion.identity);
			}
			else
			if (count == 4)
			{
				Instantiate (obj4, obj_Position.transform.position, Quaternion.identity);
			}
			else
			if (count == 5)
			{
				Instantiate (obj5, obj_Position.transform.position, Quaternion.identity);
			}
			else
		    if (count == 6)
			{
				Instantiate (obj6, obj_Position.transform.position, Quaternion.identity);
			}
			else
			if (count == 7)
			{
				Instantiate (obj7, obj_Position.transform.position, Quaternion.identity);
			}
		}
}