Scriptum/Assets/SwitchSprite.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class SwitchSprite : MonoBehaviour
{
    public bool inRange = false;
    public Sprite[] sprites;
    private List<int> availableSprites = new List<int>();
    public int current;

    // Start is called before the first frame update
    void Start()
    {
        availableSprites.Add(1);
    }

    // Update is called once per frame
    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.tag == "Player")
        {
            inRange = true;
        }
    }

    private void OnTriggerStay2D(Collider2D collision)
    {
        if (collision.tag == "Player")
        {
            inRange = true;
        }
    }

    private void OnTriggerExit2D(Collider2D collision)
    {
        inRange = false;
    }

    void Update()
    {
        if (inRange == true)
        {
            if (Input.GetKeyDown(KeyCode.E) && current != 1)
            {
                GetComponent<SpriteRenderer>().sprite = sprites[0];
                current = 1;
            }
            else if (Input.GetKeyDown(KeyCode.E) && current == 1)
            {
                GetComponent<SpriteRenderer>().sprite = sprites[1];
                current = 0;
            }

        }
    }
}