(solved/I'm tired and shouldn't be coding)updating a bool in the animator

Unity Engine
1

i have 2 BlendTrees set up. walkBT and runBT.
parameter bool holdShift is the only condition for the transitions between them

i HAD it working where i held shift and it would make holdShift True. and switch BlendTrees.
but i forgot to add a second check to make it false when not holding shift.
so I added that second check, and suddenly it won’t work at all. I half panic and control Z my code back to before adding it. And it suddenly wont work at all.
Imgur

thats just to show what I said above

using System.Collections;
using UnityEngine;

public class AnimatorHotKey : MonoBehaviour
{
    Animator anim;
    public KeyCode myKey;
    public KeyCode altKey;
    public string AnimatorBoolName;

    void Update()
    {
        if (Input.GetKey(myKey) || Input.GetKey(altKey))
        {
            anim.SetBool(AnimatorBoolName, true);
        }
        if (!Input.GetKey(myKey) && !Input.GetKey(altKey))
        {

            anim.SetBool(AnimatorBoolName, false);
        }

    }
}

thats my parameter updater. Added the component to my gameobject. Put in Left Shift, Right Shift, and holdShift.
run game, my first BlendTree is working, I hold shift, I can see that holdShift isnt changing and nothing is happening. Cry. try not to cry. cry harder.

what did I mess up when I went to fix this.

2

ugh i deleted my start alltogether

private void Start()
{
anim = gameObject.GetComponent();
}

ignore thread. I’m tired and should sleep instead of coding