Lerp Moving Instantly

I'm going to refactor all of this code...but for now, I'm trying to figure out why my creature is lerping to the destination immediately (no matter what I set the default_speed to).

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class creature : MonoBehaviour
7. {
8.     public float default_speed = 0.01f;
9.     private Rigidbody rb;
10.     private bool moved = false;
11.     private Vector3 destination;
12.     private int x, y;
13.     public Vector3 current_pos;
14.     float speed;
15.  
16.     void Start()
17.     {
18.         rb = GetComponent<Rigidbody>();
19.         current_pos = rb.transform.position;
20.         x = Random.Range(-15, 16) * 10;
21.         y = Random.Range(-15, 16) * 10;
22.         destination.x = x;
23.         destination.y = y;
24.         destination.z = 0;
25.     }  
26.  
27.     void Update()
28.     {
29.         patrol(); //non-aggro movement      
30.     }
31.  
32.     void patrol()
33.     {
34.         speed = Time.deltaTime * default_speed;
35.         Debug.Log(speed);
36.         transform.position = Vector3.Lerp(transform.position, destination, speed);
37.     }
38. }
39.  
40.  

speed is logging at around 0.03 in this instance....

 

Comment out:

Code (CSharp):

1. moved = true;

in if (moved == false){...}
If object moves as needed set moved=true somewhere else.