Having scripts affect each other in sequence

I'm working on a 2D game where there are door-like walls that can be opened by pressing a switch. I wanted these doors to be set up as sprites stacked up on one another; that way I can make each door as tall or small as they need to be. However, I'm having problems with the doors opening correctly. I wanted them to open from the bottom up, and have the switch set to only open the bottom segment of the door; however, when I press the switch, all segments of the door open at the same time. Also, when I come off the switch, it should close the door, but it doesn't. The door stays open. How do I get the door to open from the bottom up, and close when the switch isn't being pressed down?

Here's the code for the door:
public class LockedWall : MonoBehaviour {

     public Animator anim;
     private Collider2D collision;
     public GameObject segmentAbove;
     public GameObject segmentBelow;
     public bool isBottom;
     public bool isTop;
     public bool isOpen;
 
     void Start()
     {
         anim = GetComponent<Animator>();
         collision = GetComponent<Collider2D>();
         isOpen = false;
         if(segmentBelow.tag != "LockedWall")
         {
             isBottom = true;
         }
         if (segmentAbove.tag != "LockedWall")
         {
             isTop = true;
         }
         if (segmentBelow.tag == "LockedWall")
         {
             isBottom = false;
             segmentBelow.GetComponent<LockedWall>();
         }
         if (segmentAbove.tag == "LockedWall")
         {
             isTop = false;
             segmentBelow.GetComponent<LockedWall>();
         }
     }
 
     public void DoorBottomOpens()
     {
         if (isBottom)
         {
             anim.SetBool("open", true);
             collision.enabled = false;
             segmentAbove.GetComponent<LockedWall>().DoorOpens();
             IsOpen();
         }
     }
 
     public void DoorOpens()
     {
         if (!isBottom)
         {
             anim.SetBool("open", true);
             collision.enabled = false;
             IsOpen();
         }
     }
 
     public void DoorTopCloses()
     {
         if (isTop)
         {
             anim.SetBool("open", false);
             collision.enabled = true;
             segmentBelow.GetComponent<LockedWall>().DoorCloses();
             IsClosed();
         }
     }
 
     public void DoorCloses()
     {
         if (!isTop && segmentAbove.GetComponent<LockedWall>().isOpen == false)
         {
             anim.SetBool("open", false);
             collision.enabled = true;
             IsClosed();
         }
     }
 
     void IsOpen()
     {
         if (!isTop)
         {
             segmentAbove.GetComponent<LockedWall>().DoorOpens();
         }
     }
 
     void IsClosed()
     {
         if (!isBottom)
         {
             segmentBelow.GetComponent<LockedWall>().DoorCloses();
         }
     }
 }

And the script for the switch:

 public class Switch : MonoBehaviour {
 
     private Animator anim;
     [SerializeField]
     private bool redSwitch;
     [SerializeField]
     private GameObject doorTrig;
 
     void Start()
     {
         anim = GetComponent<Animator>();
     }
 
     void OnTriggerStay2D()
     {
         anim.SetBool("down", true);
         doorTrig.GetComponent<LockedWall>().DoorBottomOpens();
     }
 
     void OnTriggerExit2D()
     {
         if (!redSwitch)
         {
             return;
         }
         anim.SetBool("down", false);
         doorTrig.GetComponent<LockedWall>().DoorTopCloses();
     }
 }