Delivery.cs

//Delivery system
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Delivery: MonoBehaviour
{
    [SerializeField] Color32 hasPackageColor = new Color32(1,1,1,1);
    [SerializeField] Color32 noPackageColor = new Color32(1,1,1,1);
    
    [SerializeField] float destroyDelay=0.5f;
    bool hasPackage=false;

    SpriteRenderer spriteRenderer;

    void Start() 
    {
        spriteRenderer = GetComponent<SpriteRenderer>();
    }
    
    void OnCollisionEnter2D(Collision2D other) 
    {
        Debug.Log("Accident!");
    }

    void OnTriggerEnter2D(Collider2D other) 
    {
        if(other.tag=="Package"&&(!hasPackage))
        {
            Debug.Log("Package picked up");
            hasPackage=true;
            spriteRenderer.color = hasPackageColor;
            Destroy(other.gameObject,destroyDelay);
        }

        if(other.tag=="Delivery"&&hasPackage)
        {
            Debug.Log("Package Delivered");
            hasPackage=false;
            spriteRenderer.color = noPackageColor;
        }
    }
}