NullReferenceException: Object reference not set to an instance of an object

function Start() { blink(); //Starts the Blink script yield WaitForSeconds(respawnWaitTime); //Wait for an ammount of time destroy(); //Starts the destroy function. }

function blink() { var myRend:MeshRenderer = GetComponent(MeshRenderer); //Apply the MeshRenderer component to the myRend variable var myState:boolean = true; //Makes our state true while(true) //While our state is true { myState = !myState; //Change our state to the oposite myRend.enabled = myState; //Id our state is enabled, the renderer will be enabled. If our state is disabled, the rendeder will be disabled yield WaitForSeconds(0.25); //Waits for 0.25 seconds } }

//Inspector variables var blinkingSphereSpawnTime : int; //When to spawn the Blinking Sphere var blinkingSphere : Transform; //Add the blinking sphere prefab var blackBoxSpawnTime : int; //When to spawn the Black Box after the Blinking Sphere var blackBox : Transform; //Add the Black Box prefab var movingBoxSpawnTime : int; //When to spawn the Moving Box after the Black Box var movingBox : Transform; //Add the Moving Box prefab var spereRespawnTimeMax : int = 5; //The maximum ammount of time between the destruction and the spawning of a sphere var spawned : int; //Is the sphere spawned?

//Private variables: private var startPosition; //The starting position of the objects

function Start () { startPosition = Vector3(Random.Range(-6, 6), Random.Range(-4, 4), 0); //Generates a random spawning position yield WaitForSeconds(blinkingSphereSpawnTime); //Waits for an ammount of time Instantiate(blinkingSphere, startPosition, transform.rotation); //Creates the Blinking Sphere spawned = 1; //This is set to one, so the code in the function Update can start to run yield WaitForSeconds(blackBoxSpawnTime); //Waits for an ammount of time Instantiate(blackBox, startPosition, transform.rotation); //Creates the Black Box yield WaitForSeconds(movingBoxSpawnTime); //Waits for an ammount of time Instantiate(movingBox, startPosition, transform.rotation); //Creates the Moving Box }

function Update () { if (spawned == 1) //If the spere is spawned { if (GameObject.Find("prefabEnemySpereBlink(Clone)") == "null") //If there are no sphere spawned { spawn(); //Activate the spawn function spawned = 0; //Disable the code in the function update } } }

function spawn() {

 yield WaitForSeconds(Random.Range(0,spereRespawnTimeMax));      //Waits for a random ammount of time before spawning
 Instantiate(blinkingSphere, startPosition, transform.rotation); //Creates a new Blinking Spere
 spawned = 1;        //Re-enable the code in the function update