ShipRandomRotation

using UnityEngine;
using System.Collections;

public class ShipRandomRotation : MonoBehaviour
{
    public float LerpSpeed;
    private float updateSpeed1;
    public float UpdateSpeedMin;
    public float UpdateSpeedMax;
    private float timeout1;
    public Quaternion qTo;
    private float lerpSpeed = 1;
    private float zOffset;
    private float xOffset;
    void Start ()
    {
        updateSpeed1 = Random.Range (UpdateSpeedMin,UpdateSpeedMax);
    }

    void Update ()
    {
        timeout1 += Time.deltaTime;
        if (timeout1>updateSpeed1)
        {
            updateSpeed1 = Random.Range (UpdateSpeedMin,UpdateSpeedMax);
            timeout1 = 0;
            lerpSpeed = 0f;
            if(zOffset>180)
            {
                zOffset = Random.Range (10, 35);
            }
            else
            {
                zOffset = Random.Range (335, 350);
            }

            if(xOffset>180)
            {
                xOffset = Random.Range (5, 10);
            }
            else
            {
                xOffset = Random.Range (355, 345);
            }
            qTo =  Quaternion.Euler (xOffset,0, zOffset);
        }
        if(timeout1>updateSpeed1/2)
        {
            lerpSpeed -= Time.deltaTime*0.5f;
        }
        else
        {
            lerpSpeed += Time.deltaTime*0.5f;
        }
        transform.localRotation = Quaternion.Lerp (transform.localRotation,qTo, lerpSpeed * Time.deltaTime);
    }
}