Drawing a GUIBox on player/enemies in MiniMap

So I have a minimap, but instead of actually rendering the enemies and the player, I just want to draw a GUI box in their position instead, but I can't seem to get it to work. Here's how I tried to do it:

     private GameObject player;
     private GameObject[] enemies;
     
     void Start () {
         player = GameObject.FindGameObjectWithTag("Player");
         enemies = GameObject.FindGameObjectsWithTag("Enemy");
     }
 
 void OnGUI() {
         foreach (GameObject enemy in enemies) {
             Vector3 pos = gameObject.camera.WorldToScreenPoint(enemy.transform.position);
             GUI.Box(new Rect(pos.x,pos.y, 10, 10), "", dot);
 
         }
         Vector3 playerPos = gameObject.camera.WorldToScreenPoint(player.transform.position);
         GUI.Box(new Rect(playerPos.x, playerPos.y, 10, 10), "", dot);
     }

("dot" is a GUIStyle)

but No dots even appeared on the minimap.. Can anyone help me out please? Thanks