diff --git a/src/main/java/id/co/gtc/erhacam/AutoCloseAlert.java b/src/main/java/id/co/gtc/erhacam/AutoCloseAlert.java
index 29b2c8a..d146344 100644
--- a/src/main/java/id/co/gtc/erhacam/AutoCloseAlert.java
+++ b/src/main/java/id/co/gtc/erhacam/AutoCloseAlert.java
@@ -3,6 +3,7 @@ package id.co.gtc.erhacam;
 import javafx.animation.PauseTransition;
 import javafx.application.Platform;
 import javafx.geometry.Pos;
+import javafx.scene.Node;
 import javafx.scene.Scene;
 import javafx.scene.control.Label;
 import javafx.scene.layout.VBox;
@@ -12,9 +13,13 @@ import javafx.stage.Stage;
 import javafx.stage.StageStyle;
 import javafx.util.Duration;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Optional;
 import java.util.function.Consumer;
 
+import static Config.SomeCodes.ValidString;
+
 public class AutoCloseAlert {
 
     private static Stage currentAlertStage;
@@ -37,6 +42,22 @@ public class AutoCloseAlert {
         clear();
     }
 
+    /**
+     * Show an alert with a title, content, and automatically close after a few seconds
+     * @param title the title of the alert
+     * @param content the content of the alert
+     * @param seconds the number of seconds before the alert is closed, or put 0 to keep it open
+     * @param onClose What to do after auto close
+     */
+    public static void show(String title, String content, int seconds, Consumer<String> onClose){
+        Platform.runLater(()->{
+            Stage alertStage = _showtext(title, "", content);
+            closeAlertStage(seconds, onClose, alertStage);
+        });
+    }
+
+
+
     /**
      * Show an alert with a title, header, content, and automatically close after a few seconds
      * If called several times, the previous alert will be closed before showing a new one
@@ -48,55 +69,82 @@ public class AutoCloseAlert {
      */
     public static void show(String title, String header, String content, int seconds, Consumer<String> onClose) {
         Platform.runLater(()->{
-            // close previous alert before showing a new one
-            Optional.ofNullable(currentAlertStage).ifPresent(Stage::close);
+            Stage alertStage = _showtext(title, header, content);
+            closeAlertStage(seconds, onClose, alertStage);
+        });
+    }
 
-            Stage alertStage = new Stage();
-            alertStage.initModality(Modality.APPLICATION_MODAL);
-            alertStage.initStyle(StageStyle.UTILITY);
-            alertStage.setAlwaysOnTop(true);
-            alertStage.setResizable(false);
+    /**
+     * Create an alert with a title, header, and content
+     * @param title the title
+     * @param header the header
+     * @param content the content
+     * @return the alert stage
+     */
+    private static Stage _showtext(String title, String header, String content){
+        // close previous alert before showing a new one
+        close();
 
-            double screenwidth = Screen.getPrimary().getVisualBounds().getWidth();
-            double width = screenwidth/4;
-            double height = width * 9 / 16;
+        Stage alertStage = new Stage();
+        alertStage.initModality(Modality.APPLICATION_MODAL);
+        alertStage.initStyle(StageStyle.UTILITY);
+        alertStage.setAlwaysOnTop(true);
+        alertStage.setResizable(false);
+
+        double screenwidth = Screen.getPrimary().getVisualBounds().getWidth();
+        double width = screenwidth/4;
+        double height = width * 9 / 16;
+
+        List<Node> children = new ArrayList<>();
+        if (ValidString(header)){
             Label headerLabel = new Label(header);
             headerLabel.setStyle("-fx-font-weight: bold; -fx-font-size: 16px;");
             headerLabel.setMinHeight(height*0.25);
+            children.add(headerLabel);
+        }
+        if (ValidString(content)){
             Label contentLabel = new Label(content);
             contentLabel.setStyle("-fx-font-size: 12px;");
             contentLabel.setMinHeight(height*0.75);
+            children.add(contentLabel);
+        }
 
-            VBox root = new VBox(10, headerLabel, contentLabel);
-            root.setPrefSize(width, height);
-            root.setAlignment(Pos.CENTER);
+        VBox root = new VBox(10, children.toArray(new Node[0]));
+        root.setPrefSize(width, height);
+        root.setAlignment(Pos.CENTER);
 
-            Scene scene = new Scene(root);
-            alertStage.setScene(scene);
+        Scene scene = new Scene(root);
+        alertStage.setScene(scene);
 
-            alertStage.setTitle(title);
-            currentAlertStage = alertStage;
+        alertStage.setTitle(title);
 
-            alertStage.show();
+        alertStage.show();
+        currentAlertStage = alertStage;
+        shownHeader = ValidString(header) ? header : "";
+        shownContent = ValidString(content) ? content : "";
+        shownTitle = ValidString(title) ? title : "";
 
-            shownHeader = header;
-            shownContent = content;
-            shownTitle = title;
-
-            if (seconds>0){
-                PauseTransition delay = new PauseTransition(Duration.seconds(seconds));
-                delay.setOnFinished(e -> {
-                    alertStage.close();
-                    if (currentAlertStage == alertStage) {
-                        currentAlertStage = null;
-                    }
-                    if (onClose!=null) onClose.accept(shownTitle);
-                    clear();
-                } );
-                delay.play();
-            }
-
-        });
+        return alertStage;
+    }
 
+    /**
+     * Close the alert after a few seconds
+     * @param seconds the number of seconds before the alert is closed, if 0, the alert will not be closed
+     * @param onClose What to do after auto close
+     * @param alertStage the alert stage to be closed
+     */
+    private static void closeAlertStage(int seconds, Consumer<String> onClose, Stage alertStage) {
+        if (seconds>0){
+            PauseTransition delay = new PauseTransition(Duration.seconds(seconds));
+            delay.setOnFinished(e -> {
+                alertStage.close();
+                if (currentAlertStage == alertStage) {
+                    currentAlertStage = null;
+                }
+                if (onClose!=null) onClose.accept(shownTitle);
+                clear();
+            } );
+            delay.play();
+        }
     }
 }