Mine

using UnityEngine;
using System.Collections;

public class SpeedSlider : MonoBehaviour {

	public int speed;

	void Start() 
        {
	        speed = 0;
	}
	
	void OnGui () 
	{
		GUI.Button(new Rect(10,10,200,200),"BUTTON1");
		GUI.Button(new Rect(10,210,200,200),"BUTTON2");
	}
}