Tool to warn if fps is under a given value

FpsWarning.cs

using UnityEngine;
using System.Collections;

public class FpsWarning : MonoBehaviour {
  int fps = 0;
  public int monitorValue = 60;

  GUIStyle style;

  void OnGUI(){
    fps = Mathf.FloorToInt(1.0f / Time.deltaTime);

    if(style == null){
      style = new GUIStyle();
    }

    style.normal.textColor = (fps < monitorValue) ? Color.red : Color.white;
    GUI.Label(new Rect(10,Screen.height - 30, 100,30), "FPS "+fps, style);
  }
}