Shield Mechanic.

I have a top down 2D game and I want to add a shield mechanic where the player holds the left shift and the shield animation shows up blocking all enemies attacks and when the player lets go the shield animation stops. What's the best way to do this I have a tiny bit of code but I believe I messed it up quite heavily.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Blocking : MonoBehaviour
6. {
7.     Animator animator;
8.     CircleCollider2D Collider;
9.     void Start()
10.     {
11.         Collider = GetComponent<CircleCollider2D>();
12.     }
13.  
14.     // Update is called once per frame
15.     void Update()
16.     {
17.         if (Input.GetKeyDown(KeyCode.LeftShift))
18.         {
19.             Collider.isTrigger = true;
20.             Debug.Log(Collider.isTrigger);
21.             animator.SetBool("Block", true);
22.  
23.         }
24.         if (Input.GetKeyUp(KeyCode.LeftShift))
25.         {
26.             Collider.isTrigger = false;
27.             Debug.Log(Collider.isTrigger);
28.             animator.SetBool("Block", false);
29.         }
30.     }
31. }

 

I think you forgot to assign your animator variable. I don't see any other problem with your code (except you may want to enable and disable the CircleCollider2D instead of switching isTrigger, if it has no other purposes).
If things are still not working I would make sure your Animator Tree is set up correctly.