IndexOutOfRangeException error

Im getting this error: IndexOutOfRangeException: Array index is out of range. ShowGameover.Start () (at Assets/Scripts/ShowGameover.cs:14)

This is the script:

 using UnityEngine;
 using System.Collections;
 
 public class ShowGameover : MonoBehaviour {
 
     private float posY;
     public float endPosY;
     public SpriteRenderer gameoverBox;
     public Sprite[] gameoverSprites;
 
     // Use this for initialization
     void Start () {
         posY = transform.position.y;
         gameoverBox.sprite = gameoverSprites [0];
     }
     
     // Update is called once per frame
     void Update () {
         transform.position = new Vector3(transform.position.x, posY, transform.position.z);
         if (Movement.dead == true) {
             posY += Time.deltaTime * 10f;    
             if(posY >= endPosY){
                 posY = endPosY;
             }
         }
         if (Movement.rightPoints >= 10 || Movement.upPoints >= 10 || Movement.downPoints >= 10) {
             gameoverBox.sprite = gameoverSprites[1];        
         }
         if (Movement.rightPoints >= 20 || Movement.upPoints >= 20 || Movement.downPoints >= 20) {
             gameoverBox.sprite = gameoverSprites[2];        
         }
         if (Movement.rightPoints >= 50 || Movement.upPoints >= 50 || Movement.downPoints >= 50) {
             gameoverBox.sprite = gameoverSprites[3];        
         }
         if (Movement.rightPoints >= 100 || Movement.upPoints >= 100 || Movement.downPoints >= 100) {
             gameoverBox.sprite = gameoverSprites[4];        
         }
     }
 }

I don't know why the error is showing up, but it doesnt seem to affect anything but it happens whenever I press start and then again each time when Movement.rightpoints is greater than one of the values above. I have 5 different sprites assigned to the array in the hierarchy menu. I also have the sprite renderer checked in the hierarchy.