Object.DontDestroyOnLoad
static function DontDestroyOnLoad(target: Object): void;
static void DontDestroyOnLoad(Object target);
static def DontDestroyOnLoad(target as Object) as void
Description

Makes the object target not be destroyed automatically when loading a new scene.

When loading a new level all objects in the scene are destroyed, then the objects in the new level are loaded. In order to preserve an object during level loading call DontDestroyOnLoad on it. If the object is a component or game object then its entire transform hierarchy will not be destroyed either.
	// Make this game object and all its transform children
	// survive when loading a new scene.
	function Awake () {
		DontDestroyOnLoad (transform.gameObject);
	}
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Awake() {
        DontDestroyOnLoad(transform.gameObject);
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Awake() as void:
		DontDestroyOnLoad(transform.gameObject)