// Transforms to act as start and end markers for the journey.
    var startMarker: Transform;
    var endMarker: Transform;
    
    // Movement speed in units/sec.
    var speed = 1.0;
    
    // Time when the movement started.
    private var startTime: float;
    
    // Total distance between the markers.
    private var journeyLength: float;
    
    var target : Transform;
    var smooth = 5.0;
    
    function Start() {
        // Keep a note of the time the movement started.
        startTime = Time.time;
        
        // Calculate the journey length.
        journeyLength = Vector3.Distance(startMarker.position, endMarker.position);
    }
    
    // Follows the target position like with a spring
    function Update () {
        // Distance moved = time * speed.
        var distCovered = (Time.time - startTime) * speed;
        
        // Fraction of journey completed = current distance divided by total distance.
        var fracJourney = distCovered / journeyLength;
        
        // Set our position as a fraction of the distance between the markers.
        transform.position = Vector3.Lerp(startMarker.position, endMarker.position, fracJourney);
    }

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Transform startMarker;
    public Transform endMarker;
    public float speed = 1.0F;
    private float startTime;
    private float journeyLength;
    public Transform target;
    public float smooth = 5.0F;
    void Start() {
        startTime = Time.time;
        journeyLength = Vector3.Distance(startMarker.position, endMarker.position);
    }
    void Update() {
        float distCovered = (Time.time - startTime) * speed;
        float fracJourney = distCovered / journeyLength;
        transform.position = Vector3.Lerp(startMarker.position, endMarker.position, fracJourney);
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public startMarker as Transform

    public endMarker as Transform

    public speed as single = 1.0F

    private startTime as single

    private journeyLength as single

    public target as Transform

    public smooth as single = 5.0F

    def Start():
        startTime = Time.time
        journeyLength = Vector3.Distance(startMarker.position, endMarker.position)

    def Update():
        distCovered as single = ((Time.time - startTime) * speed)
        fracJourney as single = (distCovered / journeyLength)
        transform.position = Vector3.Lerp(startMarker.position, endMarker.position, fracJourney)