Dont understand why the button is not showing...

Unity Engine
1

So here’s the code

	public void selectedOilFarm()
	{
		if(GUI.Button(new Rect(Screen.width/2, Screen.height/2, 100,30), "Spawn a bot"))
		{
			Debug.Log ("Spawned");
		}
		Debug.Log ("This is an oil farm 2");
	}

	public void BuildingClicked() // Ok a building has been clicked, lets find out what building it is.
	{
		if(this.gameObject.CompareTag("OilFarm"))
		{
			if(this.gameObject.transform.FindChild("Selector").gameObject.activeSelf)
			{
				selectedOilFarm();
				Debug.Log("This is a Oilfarm");
			}
		} else if(this.gameObject.CompareTag("Barracks"))
		{
			if(this.gameObject.transform.FindChild("Selector").gameObject.activeSelf)
			{
				Debug.Log("This is a barracks");
			}
		} 

	}

if i click the OilFarm i get the Debug.Log(“This is a Oilfarm”); and Debug.Log (“This is an oil farm 2”);
but i dont get the “Spawn a bot” button appearing in my screen
Any idea’s any1?

EditWow a noob, i guess i need to place it in the OnGUI method?Edit

2

Is it possible to decalare a method in void GUI?