// Use this for initialization
     void Start () {
         c = GameObject.Find("Player").GetComponent<CharacterController>();
         target = GameObject.Find("Target").transform;
         
         current_pos = transform.position;
         last_pos = transform.position;
     }
     
     // Update is called once per frame
     void Update () {
         if(Vector3.Distance(target.position,transform.position)>4)
         {
             modifiedTarget = target.position;
             modifiedTarget.y = 1;
             
             Vector3 relativePos = modifiedTarget - transform.position;
             Quaternion rotation = Quaternion.LookRotation(relativePos);
             transform.rotation = rotation;
             
             Vector3 forward = transform.forward;
             c.SimpleMove(forward * 5);
         }
         
         // this is the important part
         current_pos = transform.position;
         float speed = (current_pos - last_pos).magnitude/Time.deltaTime;
         print(speed);
         last_pos = current_pos;
     }
}

rotateZ += transform.Rotate(Vector3.forward * Input.acceleration.x * 1); ;
rotateZ = Mathf.Clamp (rotateZ, -90, 90);
     
transform.localEulerAngles = new Vector3(transform.localEulerAngles.x, transform.localEulerAngles.y, -rotateZ);

transform.rotation.eulerAngles = new Vector3(Mathf.Clamp(transform.rotation.eulerAngles.x, -90, 90), transform.rotation.eulerAngles.y, transform.rotation.eulerAngles.z);

var fb:GameObject;  
public var coun:int = 0;  
var F:GameObject;  

function Update()   
{   
for (var myTouch : Touch in Input.touches) {  
     if (myTouch.phase == TouchPhase.Began)  
Instantiate(fb,transform.position,transform.rotation);  
    }  
}  

ArrayList<GameObject> myList = new ArrayList<GameObject>();//объявление массива игровых объектов      
myList.add(myObject);//добавляем элемент в конец списка. данную строку можно ставить сразу после Instantiate(...);