Changing the Panel Source Image through code

Hi,

I am trying to change the source image of the panel (my background) through code. In my game I have upgrades that will add stuff to the background image. I have a bunch of background images to cycle through but I can't seem to find anything online about how to change the source image of the panel background through code. Here's what I have so far.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using System.Globalization;
public class Background : MonoBehaviour
{
public Sprite Scene2;
public void Change()
{
if (MoneyPerSecond.level == 2)
{
GameObject.Find("Panel").GetComponent<Image>().sprite = Scene2;
}
}
}


Thanks

 

Everything looks right. Just make certain you have the actual asset set to type "Sprite" in the import settings, and that you've linked it into the Inspector.

 

I think I did that and I am getting this error:

UnassignedReferenceException: The variable spriteRenderer of MoneyPerSecond has not been assigned.
You probably need to assign the spriteRenderer variable of the MoneyPerSecond script in the inspector.
MoneyPerSecond.Upgrade () (at Assets/Scripts/MoneyPerSecond.cs:24)
UnityEngine.Events.InvokableCall.Invoke () (at <b53f6837a4614744b595be69da4cbb29>:0)
UnityEngine.Events.UnityEvent.Invoke () (at <b53f6837a4614744b595be69da4cbb29>:0)
UnityEngine.UI.Button.Press () (at C:/Program Files/Unity/Hub/Editor/2020.1.0b4/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/UI/Core/Button.cs:68)
UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at C:/Program Files/Unity/Hub/Editor/2020.1.0b4/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/UI/Core/Button.cs:110)
UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at C:/Program Files/Unity/Hub/Editor/2020.1.0b4/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:50)
UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at C:/Program Files/Unity/Hub/Editor/2020.1.0b4/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:261)
UnityEngine.EventSystems.EventSystem:Update() (at C:/Program Files/Unity/Hub/Editor/2020.1.0b4/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/EventSystem.cs:376)