OnMouseDown how to call yield?

I want after few sec that my GameLog is erazed so it's not at screen all the time

if you think it's too simplified I'll post whole code

 public class PickUpObject : MonoBehaviour {
     private GameObject Player ;
     public Depth0 Depth0Script;
 
     void Start () {
         Player = GameObject.Find("Camera");
         Depth0Script = Player.GetComponent("Depth0") as Depth0;
 }
 
 void OnMouseDown () {
             Depth0Script.GameLogs = ("humh I need tools for this");
             Depth0Script.GameLogTimerF();
 }

 public class Depth0 : MonoBehaviour {
     public string GameLogs = "" ;
     private float GameLogTimerf = 1;
     public IEnumerator GameLogTimerF (){
         GameLogs = "";
         yield return new WaitForSeconds(GameLogTimerf);
     }
 }

now If I just change 2 lines here it works but I want it to wait too

         public Void GameLogTimerF (){
             GameLogs = "";
             //yield return new WaitForSeconds(GameLogTimerf);
         }

what am I doing wrong why does it not want to call this function?

how do I call it?