Make a gameobject spawn before enemies spawn? (C#)

Question

Hello! I'm developing a 2D mobile game and I have a little problem. I have created a spawn system, that spawns bouncing balls at a random location inside a rectangle. I'm now trying to create a spawn system for another gameobject, this gameobject is meant to show where the bouncing ball will spawn. It'll only show up for a second just so the player can identify and highlight that "Ahhh an enemy ball will spawn here". The Gameobject is called "ShowEnemySpawn" and I instantiate it in the same function that spawns out the enemy balls using the same position, I also use InvokeRepeating to make the bouncing balls spawn out every 2 seconds.

How do I spawn the "ShowEnemySpawn" Gameobject for 1 sec before the Bouncing enemy ball spawn?

I've been trying to search for a solution, but has been unable to find a one. So I'm really grateful for any help I can get! Here is the code!

 using UnityEngine;
 using System.Collections;
     
 public class EnemySpawn : MonoBehaviour 
 {
     
         // EnemyPrefab
         public GameObject EnemyBouncingPrefab;
     
         //Show where spawn is prefab
         public GameObject ShowEnemySpawn;
                
         // Borders
         public Transform borderTop;
         public Transform borderBottom;
         public Transform borderLeft;
         public Transform borderRight;
         
     
         void Start () 
         {
             // Spawn boucning enemies every 2 seconds, starting in 3
             InvokeRepeating("SpawnBouncingEnemy", 3, 2);
         }
     
         // Spawn a Bouncing enemy
         void SpawnBouncingEnemy() 
         {
     
                 // x position between left & right border
                 int x = (int)Random.Range (borderLeft.position.x,
                                       borderRight.position.x);
             
                 // y position between top & bottom border
                 int y = (int)Random.Range (borderBottom.position.y,
                                       borderTop.position.y);
     
                 // Sets the prefab where an enemy will spawn
                 Instantiate (ShowEnemySpawn, new Vector2 (x, y), Quaternion.identity);
     
                 // Instantiate the power up at (x, y)
                 Instantiate (EnemyBouncingPrefab,
                                     new Vector2 (x, y),
                                     Quaternion.identity); // default rotation
     
         }
     }

Answer 1

You can use coroutines to easily write code that can suspend execution a second midway a function.

 using UnityEngine;
 using System.Collections;
 
 public class EnemySpawn : MonoBehaviour
 {
     // EnemyPrefab
     public GameObject EnemyBouncingPrefab;
 
     //Show where spawn is prefab
     public GameObject ShowEnemySpawn;
 
     // Borders
     public Transform borderTop;
     public Transform borderBottom;
     public Transform borderLeft;
     public Transform borderRight;
 
     void Start()
     {
         StartCoroutine(SpawnBouncingEnemy());
     }
 
     // Spawn boucning enemies every 2 seconds, starting in 3
     IEnumerator SpawnBouncingEnemy()
     {
         yield return new WaitForSeconds(3);
 
         while (true)
         {
             Vector2 spawnPoint = RandomPointWithinBorders();
 
             // Show spawn location for one second
             Object marker = Instantiate(ShowEnemySpawn, spawnPoint, Quaternion.identity);
             yield return new WaitForSeconds(1);
             Destroy(marker);
 
             // Spawn enemy
             Instantiate(EnemyBouncingPrefab, spawnPoint, Quaternion.identity);
             yield return new WaitForSeconds(1);
         }
     }
 
     Vector2 RandomPointWithinBorders()
     {
         Vector2 random = new Vector2();
         random.x = (int)Random.Range(borderLeft.position.x, borderRight.position.x);
         random.y = (int)Random.Range(borderBottom.position.y, borderTop.position.y);
         return random;
     }
 }

Make a gameobject spawn before enemies spawn? (C#)

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